Anatomy of a Shot - Standard Deviations Deciphered

[@jrod6940]

I've been looking high and low for a proper explanation on SD. WOW!!! Just amazing! Subscribed!

[@TwoMinutesToTarget]

@jrod6940 thanks for the kind words!

[@ecvolt2976]

Wow!!!! That is without a doubt the best explanation and visual of standard deviation applied to shooting I have ever seen thank you so much.

[@TwoMinutesToTarget]

Thank you for the note. One of the goals was to educate people about what SD really means. I would bet if you asked 10 shooters what it is, one would give some semblance of a correct answer. Most would simply know that you want them as low as you can go, without understanding how low is good enough for the type of shooting you're doing.

[@fernandoquintana7238]

Excellent video! You explained the statistical analysis of sd quite well. It was easy to understand.

[@TwoMinutesToTarget]

Thanks - the next will be focusing on more ways to reduce SDs - with data, of course.

[@georgeneufeld-cz9by]

This is excellent information!!

[@TwoMinutesToTarget]

Thanks!

[@Nonedw]

That’s really a great video. I’ve been using NL2 for over a year now and I have noticed a difference distance.

[@nickbrown9951]

Question: I’m guessing that you have to let the NL2 dry before you charge the cases ? Next question: how long does it take to dry? Lubricating the cases does work, I started by dipping the bullets in the Imperial case neck lube and then seating them with an arbor press. I have noticed that my groups have gotten better. But ya know we are always looking for something better.

[@TwoMinutesToTarget]

I usually let NL2 dry for about an hour. It's likely dried well before that, but I like to be sure. I'm not exactly sure what sealing in evaporating alcohol would do to burn rate, but it would likely not be uniform case to case.

[@davewattles7237]

Thank you for giving standard deviation meaning, and turning it into a tool. Then some tips on lowering it!!

[@TwoMinutesToTarget]

Thanks for the comment!

[@amirdzaferovic3489]

Great Video! keep them coming.

[@TwoMinutesToTarget]

Based on our PMs, you've convinced me to do some serious testing on neck turning.

[@pogo458]

Great lesson

[@TwoMinutesToTarget]

Thanks!

[@dburns455]

Well done! Thanks.

[@TwoMinutesToTarget]

I'm glad you liked it.

[@JARNOLD-xi2vt]

Well done.

[@TwoMinutesToTarget]

Thank you.

[@thegriff9425]

Great video. Subbed.

[@TwoMinutesToTarget]

Appreciate it!

[@gerritvanrooyen4104]

Absolute fantastic, factual, measure to know. Could you do a video on case filling, what will the impact be on all the variables. Just subscribed, lots to catch up on. Thanks

[@TwoMinutesToTarget]

I'm assuming you're referring to % case fill. I've been thinking about that one and how to show meaningful results. It's pretty straight forward to depict how lower case fill can cause burn rate differences, but less straight forward to show in practical terms... however... as I'm writing this response, I'm thinking about it. If I could find a fast burning powder that will be safe to fire at low enough fill, I could run something like 25 rounds through where I chamber a round, point the rifle up to get all the powder to the back of the case, then very slowly bring it back down to fire. Then do the reverse. Would be an interesting test.

[@dinoc.5537]

Nice presentation.

[@TwoMinutesToTarget]

Thanks!

[@guyschwartz1510]

Excellent video as always. Question, did you test the difference in seating force and SD with NeoLube VS. Imperial neck lube? would be interested to know the results.

[@TwoMinutesToTarget]

I have and found NL2 to be slightly better in larger cases. HOWEVER, there are some idiosyncrasies with this. The first is that I've heard of people having issues with Imperial not sticking to annealed cases as well. I do not have that problem and I did some testing to try to find out why. My belief is that because I use an ultrasonic to clean brass, some of the soapy cleaning solution sticks to the cases. My further belief is that this soapy film enables the graphite to stick better to my annealed cases. I did try thoroughly washing a batch of cases and comparing to non-thoroughly washed (my standard), and the "standard" method showed significantly better results. I can't definitively say, however, that the better results were due to the soapy residue. Additionally, most of my testing with NL2 has been on 30-cal case necks. I am about to start some testing on the thickness of dipped and "painted on" NL2 using brass strips, as well doing some other things to see if they affect SDs. I'll be applying this to smaller case necks to see what impacts they have.

[@pineridgeoutdoors2021]

Awesome video. Question though, how long does it need to “dry” so to speak before you charge the brass so your powder doesn’t stick to the lube?

[@TwoMinutesToTarget]

I let it dry for about an hour, though I think it is dry well before that.

[@jeffreybossingham1732]

Thank you

[@TwoMinutesToTarget]

You're welcome!

[@LiquidColourDesignBallycarry]

where can one get Neo Lube, do you mix this yourself?

[@TwoMinutesToTarget]

I didn't go into this in the video due to time considerations, but here are some considerations for lube: - Graphite can have a tough time sticking to annealed brass. Because of how I clean brass, the cleaner leaves a slight residue that I believe allows graphite to stick better. As such, it works decently well for me. - Of the powdered lubricants, I found moly to be slightly better than graphite and both to be significantly better than others I tested. - I found Neolube to be roughly the same as moly as far as results are concerned, but quicker and easier to apply. I'm going to do more testing and on different calibers. - As for getting Neolube, you can order 2 oz. on Amazon, but it is expensive (like $35). You can order it directly from the manufacturer in much larger quantities. I got a quart from them. huronindustriesinc.com/shop/lubricant/

[@paulmatthews2035]

Just search for "Colloidal graphite solution in isopropanol" Neolube is just one version

[@kyley808]

Do you wet tumble your brass

[@TwoMinutesToTarget]

I use an ultrasonic

[@samstewart4807]

Hi, and wow. I made these comments @ 16 minutes. I was with you UNTIL you lubed the case BEFORE you put the powder in. Ding & hmmm HOW do you KNOW the gunpowder is A, not contaminated as you fill the case? and 2, HOW do you KNOW the amount of lube on the inside of the case DOES NOT CHANGE as the gunpowder slides over it??? To me, - a "wana be paper puncher" it would seem to be better that I introduce a KNOWN amount of clean lube AFTER the powder was put in the case???????? Again, I am blown away at the amount of vertical movement from an omg 6 feet per second deviation- that is really a wtf over.- Oh, I love your videos. And lol the cheap cliche "2 min to target" is a great name.I hope you think of me as more than a "cheap cliche". I see at the end of the video, you have changed your method of lubing the case. (at end of video)Really wow to me is you got the deviation down to 6 ft. per second and still have that much spread. wow

[@TwoMinutesToTarget]

I'll posit a few things back to you. 1) How do you think that graphite would "contaminate" the powder? (either powdered or dried liquid) 2) Why do you believe that you would not "contaminate" the powder if you applied lube after charging? As to the powder taking some of the lube off as it goes past, with NL2, once it dries, it's like paint. It takes alcohol (or a 65psi, 4000-degree case ignition) to remove it. With dry lube, I suppose it could be a thing, but I've seen very similar seating forces for NL2, graphite, and moly, so, if it's happening, it's a very small impact.

[@stevemiller6044]

I will probably never shoot even 500 yards, BUT I do love to make the best ammo I can. Aoudad beware!

[@TwoMinutesToTarget]

"Probably never" because you don't want to, or don't have the location(s) to do so?

[@brianpencall4882]

That curve is called a normal distribution.

[@TwoMinutesToTarget]

Yeah - I knew that, but sometimes during voiceover you just can't quite get the words out :) When you do a good take on a long piece of narration, it's tough to go back and redo.