The IDOD neck turner: All you need to know.

For a very long time, we have been turning brass the exact same way. Use a mandrel as a pilot and have a cutter with a specified gap go around the perimeter and turn the necks to specified thickness. The IDOD uses a technique called "pinch turning" to turn the ID and the OD (IDOD) at the same time.
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[@dbmail545]

The level of this expertise is something I never would have been exposed to if I wasn't following this channel. Even if I can't justify the effort for myself I am quite happy to see you guys taking it to this level

[@pstewart5443]

Erik is really good at extracting money from my wallet. God help us all if he becomes a bill collector.

[@joshualehman685]

Me : I love Eric Cortina My Wallet : I hate Eric Cortina

[@mossranchoutdoors7249]

Would be cool to see bullets seated with the AMP arbor press after using this machine to see how much better the seating pressure curve is as opposed to using another tool or not using one at all. Very nice machine,Erik!

[@dougm7817]

Smart concept as a machinist for over 40 yrs and a shooter for even longer. A precision approach to case work is nice to see.....many people I run into on the range dont have a clue why a shooter should reload. Let alone the benefits of loading your own rounds. Great channel Eric

[@keithm1737]

I'm shooting 308 Win at 1000 yds. I've thought about this very same issue for years, every time I measure necks. I use a 21st century turner and can hold tolerance to +/- .0001 consistently when turning necks. My loaded rounds are always .003 or less. With annealing, my Lapua cases are lasting over 15 reloads with single digit SDs and still going. I don't shoot the competitions you do, Erik, and this IDOD certainly looks like something for you, but I only shoot between 3 and 4000 rounds p/year at local matches so I can't justify the price of this cutting-edge neck turner. Not sure I would see a difference on target either but I'm dancing in place waiting to see if you do. Please let us know. I shoot with a lot of people who follow you and we all appreciate you sharing your knowledge because it really helps and you are a Pro! Thanks for another nice video.

[@stkesq48]

Your channel is way more informative with these interviews you been doing kudos

[@greggarmin9426]

“ Dear Santa, I have been a very good boy this year. All I want is an IDOD CNC. Thank you Erik “

[@swamper2fly]

So after thinning the neck walls can you still use a standard FL resizing die or does one need a changeable neck bushing die

[@greggarmin9426]

At this level of shooting you definitely would want to use bushing dies. Not saying you couldn’t use standard dies but having control of neck tension plays a big part of consistency

[@swamper2fly]

@@greggarmin9426 that makes sense.

[@traxterxt05]

Greg, I wanted to push a thumb-up and push the wrong button by mistake, sorry:)

[@greggarmin9426]

No harm. 👍

[@johnmastracco3058]

Where has this been all my life? My grandfather would have loved to have this for his reloading.

[@greggjohnson7667]

Great entrepreneurial spirit! I admire the concept for sure. For those that have a benchtop lathe you could probably accomplish the same thing if you dont have spindle runout. If you're wondering the IDOD price tag is $1800 but that includes the plastic stick you knock the finished case out with. Id be worried about denting the freshly turned neck though

[@DavidSmith-cb9yo]

My thoughts exactly on removing the case. You guys have made something that does the most precise neck turning I've ever seen but it just killed me to see such perfection in the turning and then see the case beat out with a stick. Not bashing you guys or trolling, but please come up with a better way to extract the brass. great video and kudos to the individual that came up with this brainchild.

[@user-cl7jw7td5q]

Right on Erik, thanks!

[@texpatriot8462]

Version 2 will mill the entire case down to the base. That was amazing to watch. I kept thinking our military snipers need someone with that machine loading their ammo.

[@richardbriscoe8563]

The late TJ Jackson always did inside boring of case necks for his BR cases followed by several steps of outside turning and fire forming. Inside boring only briefly does away with the issue of the donut. Either periodic reaming to remove it or removing Somme of the case shoulder near the case neck will deal with a little better, but seating the bullet out so that the bearing surface is forward of the neck/shoulder junction, where possible, is a longer term solution.

[@bliz4600]

Wouldn't only neck sizing a portion of the neck down to the donut region also give satisfactory donut issue relief (in non-custom cut chambers)?

[@georgeholt8929]

Of course this quality control should be shared with the makers of precision brass cartridge cases so they can do these cuts and trims as the cases are being made so we the shooting public can load the case for the first time and have that load have the possibility of hitting our targets 10 ring at 1000 yards every time. I bet this equipment is very costly, an expense a lot of distance shooters will not be able to afford. So I’ll continue doing as I have been using hand turning tools to do the same. Bullets that start in a chamber in a case with off center neck thickness brass will shove the bullet into the lands off center, spinning down the barrel off center it will exit off center and that alone will be seen down range if the target is far enough away as the bullet transitions to subsonic speeds. As always in continue enjoying these videos, excellent work.

[@RetrieverTrainingAlone]

George, do you turn necks on virgin brass or after fire-forming? Thanks.

[@georgeholt8929]

@@RetrieverTrainingAlone I have a custom made Remington 700 in 338 LPM, and I have purchased new virgin brass, and I have trimmed this brass to the level of totally matched preparation and that included trimming the neck of the cases. When this rifle was purchased in late 2009, the only factory Ammo was either Lapua at $80.00 per 10 shot box loaded with their 250 grain bullet or Black Hills at $120.00 for 20 shots loaded with Sierra 250 grain MK Bullets. So I purchased one box of Lapua and used those loads to set up the reloading dies I have used. So then I purchase a box of virgin Lapua brass and have loaded them 5 to 7 times already.

[@RVsales]

I remove donuts from the store on my way to the match. Secret recipe for success 🍩

[@JerrBearTactical]

Wow ... that's awesome. 😁👍👊 Thanks for sharing Eric😉

[@robertackerman5621]

Recently watched the short video about Erik shooting his best ever group (1.3”@1000 yards) and noticed the IDOD neck trimmer listed among the load component/prep data posted at the end of the video. I was considering upgrading my old K&M turner to a 21st Century but was not familiar with the IDOD, so I looked it up. Loved the concept, as it always felt like the old turner was only doing half the job, but have to admit to some sticker shock. Still, it was part of the load development that produced a best ever group for Erik, so coincidence, or one small step closer to making the shooter the only significant performance variable. It will be interesting to see what the data shows while I save up for mine.

[@krenfroe1]

Ok. But are you going to test a batch of brass and see if it made a difference in accuracy?

[@PERONOSPORAHYOSCYAMI]

“Listen to everyone. Trust no one. Test everything”. Looking forward to it.

[@michaelmuzzy8401]

Awesome as always, These interviews are killer .

[@Dwayne7834]

Nice equipment for turning the neck on your brass. Thanks for sharing.

[@rickbremmer3838]

Thanks for the vid Eric! Always nice to learn new things. Neck tension is my nemesis.

[@robertoaragon1506]

Looks like a great piece of machinery. Thanks for the videos and the knowledge. A king amongst men 😁

[@Walleye_Warrior]

Good job Eric,

[@MikeJones-iy3hf]

Another interesting video Eric……..You’re a clever man Bryan !!!

[@amirdzaferovic3489]

great video!

[@evanmiris5765]

That's taking it to a whole next level.

[@glenpaul3606]

Very Kool machine...very knowledgeable guy !

[@vincef5832]

Now that’s a neck turner. Perfection 👌

[@jebblinne3273]

Erik rocks!

[@landlockedviking]

That things amazing!

[@danmacdonald1291]

Good call with the case run out! I purchased mine thinking you could “skim” the high spots off the outside and turn the doughnut from the inside... Unfortunately I had a custom die made for a certain neck diameter which was larger than what I needed to size the case neck after turning it fr9m 15 thou to 12.5 thou wall thickness. Once you’ve got the run out lower than 1 to 1.5 thou on your cases she’s an unbelievably consistent machine. I love it! Peterson 284 brass turns up perfectly.

[@daviddale3624]

And I thought that I was the only person who rotated the brass and recycled three times to achieve uniformity. Others have the "disease" too.

[@faburoes]

And I turn it every time 60 degrees after each single hub

[@xnorcal831x]

I always wondered why neck turning was o.d. not i.d. it seems like bullet release would be more important than aligning the round with zero run out. K am glad I am not the only person turning round and resizing them to get a more straight round. It would be cool to see a group of f class shooter all get together to talk about the little things for great reloading. No need to tell secrets but help others

[@IHFarmer2007]

Inside for those darn DONUTS that happen and screw A LOT up!! Consistent ID consistent release of the bullet. Also a mandrel on a neck cutter can gauld or make it ruff in the ID of the neck.

[@metalifann42]

Love it

[@juliusjames5577]

Such cool toys!

[@sidekickbob7227]

Interesting machine. Does what it is intended for quite fast and easy. It might be due to the microphone, but the noise was loud and kind of grinding. Didn't expect that from this kind of precision machinery. The technic with a double cutter is well known, and often seen on break disk lathes, when those was in use back in the days.

[@chrismiller6792]

I’m only new to F/class hunter class and this shit just spins me out lol 😂 very nice machine

[@aussiesteveakastevecallagh2280]

Great stuff Erik thanks for showing us that looks expensive , there’s nothing like that over here , Steve from Australia

[@SnipeU696]

thank you.

[@duggydo]

That's a cool machine.

[@scottca9780]

I don't even need this level of precision but I want one because the machine is so cool.

[@o2wow]

i like this concept and I wonder how using a Lee Collet die would compare since it compresses a case neck into a ground rod.

[@PrebleStreetRecords]

Almost like a tiny version of hammer forging. Doing that and annealing before neck turning would be a good call, because you’d end up removing less material.

[@scarecrow6292]

Damnit eric.... you have spent SO MUCH of my money showing me all this cool stuff.

[@ErikCortina]

lol

[@tonydevich7937]

Bryan nice to know ya, just ordred one

[@Skilpadjie1]

Love it. Want it. Need it. But where on reloading bench do I get more room?

[@scottturner3081]

Thanks

[@ryridesmotox]

Me: I bet my Lee press is holding back my loading. Watches video... well shit, I guess I just stuck then

[@alockworkorange7296]

Next version need a rod/pin that pushes the case out afterwards (preferably pushing on the inside of the case to avoid damning the rim but still work with muliple differnt caliber) so u dont have to hit them multiple times with that plastic "hammer" while avoiding damnaging to the rim of the case

[@heddok3908]

My Gawd does he ever move fast, if anybody else was doing this demo it'd be 2 hours long

[@CS-xg2xh]

I'm with Kevin. We need an objective test to quantify a measurable difference in performance. I can see where the IDOD makes the case neck concentric to the case body, where a mandrel and cutter only uniform the neck thickness. A test measuring group size at multiple distances would tell what the effect is and at what distance it's significant. Would the IDOD also promote lower ES since he touts it as providing uniform bullet release?

[@rgthomson100]

i use sizing die wax inside neck for the ordinary dies with expander, it does not deform nearly as much Thats only for hunting loads, for comps i use bushing dies

[@evanaspiotis9967]

Nice bit of kit, how's the amp annealer going Erik?

[@bobmcelver1484]

And I thought I was micro-involved with my old Forester stuff....you F class guys leave us in the dust lol......go figure. Nice job !

[@ramsaycountry1177]

Do you neck turn for fclass matches Erik?

[@josephkrafft7006]

Cool neck turner......that red hat tho. You earn those! 👍😎

[@o2wow]

Looks like the basis of a brass treatment service business.

[@texpatriot8462]

I was thinking the same thing. Buy the machine and sell the brass to cover the cost.

[@o2wow]

@@texpatriot8462 good idea, I was thinking of a brass turning service.

[@conservativesniperhunter7439]

American ingenuity and know how , man it doesn’t get any better than this . The Germans will be envious.

[@edmundooliver7584]

it's just a lathe

[@conservativesniperhunter7439]

@@edmundooliver7584 Has anyone made one that size to be able to shave brass inside and out of the case necks ? I don’t know of any out there .

[@joeldubose5762]

When I turned the necks down small and had a reamer made to adjust for the od neck, it made it goofy on the approach to the lands .

[@jwiatrek]

Hey Eric - for you 6x47 Lapua - what neck tension do you run? I go with .002 on my ARs but was thinking .001 for bolt action.

[@davidhutchinson6108]

Nice.

[@bizerko1194]

How much does this shorten case life?

[@thompsonjerry3412]

Have you experimented with collet neck dies, like the Lee Precision Neck Collet Die, the one I have seems to do a good job evening out the neck thickness.

[@l.p.5259]

I suggested this to cortina about a year or so back, and he pretty much told me I was a retard. I’ve used them for years and always had great luck and results

[@michaeltuckerman6983]

I had that mentality years ago doing the inside as well as the outside

[@michaeltrottier9467]

And for many years I thought there was nothing could ever be better than the 21st Century turning lathe... this seems superior! Please tell me you can also use this machine as a 3 way trimmer! ?

[@brian427cobra5]

Any issues with the tool cutting marks on the inside of the neck?

[@cameronkeating6780]

Great machine, I just cant see this in my future. I don't even want to look at the cost.

[@joeldubose5762]

Eric Cortina , how much do you think that this is worth in accuracy ? How about Amp annealing combined ?

[@maxchalice5625]

Is this the only device out there that will turn both the inside and the outside. I'm new to this and I don't see anything else comprable. It also seems like manufacturers are missing out on a ready to go percision brass Market.

[@ugintarshikov]

Thank you for your videos, for those people who are more on a budget what could you say about the Hornady neck turner, is it worth using it vs not neck turning at all?

[@ErikCortina]

21st century neck turner is what I would get.

[@davidbest7641]

Thanks Eric this is was very interesting. Consistency = Accuracy. I already knew that just not the extend that really smart people go to too reach it. great stuff. I almost forgot. I saw a review of the IDOD on an Australian reloading page it read. Cost me my Dick and a Kidney but the results speak for themselves. (best review i've ever read).

[@planeiron241]

nice!!!!!!

[@b2lee150]

Thanks for costing me some more money Erik!!! I was ok until you showed the new model...now..I gotta have it.

[@rajoshusse]

Thanks for sharing. Do you neck turn your Lapua brass Erik?

[@ErikCortina]

Only for F-Class.

[@Skilpadjie1]

Was those cases lubed during sizing.

[@dougbotha8768]

These guys are Genius!!!!

[@madman432000]

After watching this and a couple other neck turning vids, I guess I can cut a little deeper into the shoulder. I was always stopping right at the base of neck and feared cutting into it. Guess I can go a couple turns more.

[@georgeholt8929]

Phil Ward, the resulting step will invert itself and be on the inside of the case, but remember as the case grows longer that step might serve as a stop for bullet seating and then it will need to be trimmed off as the case grows more.

[@mikekopmanis2099]

Close to the same thing is to bushing size the O/D until you get a cleanup on the I/D with a Neck reamer. Then hard turn a standard neck turn mandrel of a larger size (303 British 0.313" in 30 cal for example) down for a tight fit. Then turn the O/D to provide 95% cleanup. Whala.

[@mikekopmanis2099]

I do this with Forester tooling and get 0-0.0002" runout.

[@ErikCortina]

Wow. What do you use to measure runout down to 0.0002”?

[@mikekopmanis2099]

I use a Brown and Sharp 0.0001" indicator, available anywhere they sell tool and die measurement tools. Interrapid is another mfg.

[@mikekopmanis2099]

Brown and Sharp also makes a 50 millionths indicator (0.000050"), same as half a tenth.

[@ErikCortina]

I have the 50 millionths brown and sharp indicator. It’s crazy sensitive.

[@alkalk8938]

I've wondered for years why we turn the outside of cases when it would be more beneficial to turn the inside of the neck to be true to the case body. His machine kills both birds

[@freedomisgolf5816]

I want one but will get in trouble from wife as I’ve spent enough already thanks Eric PS I found what sought of calipers you use and bought a set 🇦🇺🇦🇺🇦🇺

[@wrstew1272]

Just WOW!!! Santa!

[@stevelavalette6898]

Does whacking the brass out not dent the case mouths ?

[@danmann5030]

I am new to the Bench Rest Shooting Sport and I have a question if someone could help me out. I have already turned the outside necks of 300 cases of Lapua 6mm BR brass to .0110 and they have been fireformed. I also have around 300 cases of twice fired brass with the OD turned to .0110. Once I FL Sized the cases, I checked the inside diameter of the necks and there is some run out that I would like to address. Would the IDOD be able to address this issue without cutting additional brass off of the OD of this brass?

[@longrange1114]

The never ending quest for perfection. Pretty cool but a lot of records have been set without it.

[@mybuickskill6979]

Damn. Fitting to just make your own brass next my guy? 😂😇🤤 i want one!

[@curtwarkentin6167]

And that is what separates the guys putting 10 rounds through a single hole and me lol. If i had the money I’d definitely go for it. I love target shooting at my farm but dang the sky is the limit for gear and equipment. Great idea and it looks like it’d last forever. I’ll have to save my pennies for a while.

[@my1956effie]

Nice bit of gear.

[@freedomisgolf5816]

Hi Eric I know this has nothing to do with this video I’m sorry in advance but I need a new set of calipers what set do you suggest please Keep up the good work your content is exceptional 🇦🇺🇦🇺🇦🇺

[@baddy29743]

Looks like this would be great for wsm brass

[@duckslayer11000]

I don't need this because I neck size my brass to perfection 🤣

[@wildcat_reloading]

Was saving up for a normal neck turner.... Looks like im saving up fpr something new 🤣

[@machinist7230]

It's a very impressive machine, but at 1800 dollars it's too rich for my blood. I'm just gonna buy the PMA turner.

[@wildcat_reloading]

@@machinist7230 my cheapskate idea was to get an outside neck trimmer and a neck reamer, witch in theory should do the same without the minute adjustment...... Im a student so 1800 is alot of money, especially of i need to import this then im look looking at an increase to about 2000 then converted with the exchange rate would turn to R30 000, basically the price of an amp annealer, or dubbel the price of a labradar......those are huge monetary falues for a 21 year old geology student 🤣🤣🤣

[@wildcat_reloading]

@@machinist7230 it would technically be cheaper for me to buy a 20" lathe... I'd save about 200 dollars give or take All tho for this kind of work a 12 inch mini lathe would work perfectly and they go for about 600 dollars

[@machinist7230]

@@wildcat_reloading a PMA turner is around 135 bucks, with carbide pilots around 60 usd a pop. Unless you're turning large quantity of cases, I think a simple(and vastly cheaper) hand turner makes more sense.

[@wildcat_reloading]

@@machinist7230 at the moment om only working with 100 pieces of brass, i switched from pmp braas to lapua, so i first whant to develop al loads with the standard brass so o can get back to shooting more and then ill start neck turner in volume, but for now i need something i can test with to see it makes a difference

[@TheDkb427]

How does that shell holder hold the brass? Just clamp down? Doing 300 brass or even cutting primer pockets suck doing it one at a time. Why isn't there a way to put 50 casings in a tray and clamp them all down to just drill out the primer pocket or trim and deburr. I've tried of thinking of how but I'm not an engineer.

[@JohnThomas-gj2zg]

But doing this how mine time's can you reload the brace ???

[@martinduke4644]

After all that time and expense, are you now going to have custom diameter throats in your barrels matching the turned, minimalist case neck diameters? Seems like F-class needs to be named Long Range Benchrest.

[@fentonpainter7907]

When you fire form a case and the heat and pressure force the neck against a, hopefully, concentric chamber; can you get away with turning the inside only and then using the appropriate bushing to get your neck tension? Also, I’m not understanding the use of the 7mm expander. Was that simply to ‘flow’ the donut back into the neck?

[@ErikCortina]

It was 6.5 brass he was necking it up to 7mm.

[@BurnDuration]

Great stuff! Folks who go to this level is why I would not want to compete in F-Class, and stick with PRS/NRL type of competitions.

[@ZERO_42069]

I want that

[@tonycking0121]

Wow we will soon be using a Renshaw probe on cases before we know it lol.

[@lucasoldaker2158]

Fclass products should sponsor eric

[@ErikCortina]

👍😁

[@adamstevenson2485]

How do I get one?

[@patrickduguay8]

Impressive machine! Where do I buy one?

[@ErikCortina]

Fclassproducts.com