300 RUM vs 30-378 WBY: Battle of the super 30's!

In this video I compare two 30 caliber magnums that are class leading in velocity. I compare the 300 Remington Ultra Mag vs the 30-378 Weatherby mag. Hope you enjoy the video!

[@ReloadingWeatherby]

I accidentally forgot to show you the velocity numbers for the 30-378 Weatherby. What I meant to show you was that you could get 3500 FPS with a 165 gr, 3400 FPS with a 180 gr and 3300 FPS with a 200 gr.

[@georgecruz6226]

ABSOLUTELY LOVE MY 300RUM!

[@ReloadingWeatherby]

Nice

[@jackybidault3867]

30.378 more strong

[@jamespmullin21753]

People seem to be neglecting the big bore calibers. Even if you never get to hunt elephant in Africa or huge Asian tigers it is still fun to own 375s, 416s, 458s and 460s.It's America, we can have what we want, not what we need.

[@vervi1jw1]

A buddy of mine felt this way and built a rifle in all the calibers you listed. My shoulder hurts years later. Lol.

[@jrhunt414]

I’m glad you mentioned the elephant in the room. That factory 300 RUM ammo is about the same ballistics as 300 wby factory ammo.

[@ReloadingWeatherby]

Have to reload for it....

[@Weatherby406]

I will definitely enjoy this one.. still waiting on my backcountry 2.0 carbon in 30-378.

[@edwardabrams4972]

Actually the very fast cartridges do better with the carbon fiber barrels because of heat dissipation! I know because I bought one of the Accumarks for my father when they first came out

[@FranktheDachshund]

Well how is it?

[@NYPrepper]

Very true with 300 RUM factory loads are like 90% of max. Another big advantage is you can find ammo much easier. My local gun store here in PA had some factory ammo. This is a big consideration if you travel to hunt or don't reload. You could go the custom route with the 30-378.

[@ReloadingWeatherby]

Are you reloading for your 300 RUM?

[@jwdundon]

I've owned both those cartridges. I've also reloaded them, a lot. The weatherby is a monster for getting stuck cases, it's a real pain in the ass to hand load. The 300 rum is like loading a 30-06 nice and simple. That is a MAJOR factor for me. To REALLY use all the powder, you need a 30"+ barrel ... Without weatherby I get a muzzle flash 10 ft long and 2 ft across it was quite impressive! But, a lot of wasted powder.

[@ReloadingWeatherby]

Stuck cases in the chamber or in the reloading die? That doesn't sound like a cartridge problem...

[@davemiller9314]

I have a 30-378 and hand load 180 gr Swift Scirocco with RL 25 powder at 3.550 fps. Through 2 different chronographs. And very accurate...

[@ReloadingWeatherby]

Wow

[@NYPrepper]

That 30-378 looks crazy. Huge case. Thanks for the comparison. Me and Chuck were discussing a collab 300 win vs 300 wby vs 300 rum. I got a 300 rum now with 26" bbl.

[@ReloadingWeatherby]

Sounds fun

[@marksanford3907]

The RUM is definitely more efficient... don't have a 300 RUM, but I do own a custom 338 RUM, my elk thumper! Haven't had a chance to take an elk with my 30-378 yet, but it's coming! Great video keep'm coming!

[@ReloadingWeatherby]

Looking forward to hearing about the 30-378 Weatherby

[@sivaratnamasabaratnam8946]

​@@ReloadingWeatherbyRum despite a powerful round is not durable in barrel longevity with throat erosion and wild recoil,for a hunting rifle that will be a huge costly maintenance! 378 is the King of 30 caliber rifles,but more suitable for Army artillery since for it's flat shooting accuracy at ranges! But as for hunting I feel wby 340 and 375 is much convinient for hunting animals,of all categories!

[@jackybidault3867]

30.378 more strong than 300 rum 😊

[@bustabass9025]

Once again, a cartridge with the Weatherby pedigree is leading the way. Just as when compared against the 30 Nosler, which appears to be another fine .30 caliber cartridge, the Weatherby leaves nothing in the brass, velocity and ballistically speaking. I have had mine for over twenty years. It's still as accurate today as it was when I compared my first three shots, to the three on the sub-moa verifying test target, that came with it.

[@jwdundon]

Obviously you have never loaded a 3378 by hand. About 1 out of 5 cases get stuck! It's a real nightmare with a double radio shoulder the 300 rum it's as easy to load as a 30-06.

[@bustabass9025]

@jwdundon If you mean 30-378, not "3378" you're "obviously" wrong... on both accounts. I have a 30-378 Weatherby Mark V Accumark that I have had and handloaded various cartridges for over the past fifteen years. Not one single issue sticking or otherwise with any of them. By the way, I also handload for my .340, .300, and .257 Weatherby rifles. All double radius cases. All high velocity cartridges. No "1out of 5" stuck cases. Perhaps you should get someone to teach you handloading.

[@davidciolino965]

Great video. I have a 300 Rum. I was considering the 30-378 wby. Just wanted a little more. So I went and got a 338-378 wby.

[@ReloadingWeatherby]

Haha nice!

[@WhiteoutSnowy]

If you had to pick between 338-378 or 30-378 which one would you go with ? For me I think I would pick 30-378 165 grains setup 3500+ fps

[@flatoutautomotive]

That's gonna put some hurt on something.

[@UI_Shaggy05]

The only known cartridges that are faster than the 30-378 Weatherby are: •.204 Ruger (24 grain): 4,500 fps •22-250 Remington (35 grain): 4,450 fps •.223/5.56 (35 grain): 4,000 ft/s •.220 Swift (29 grain): 4,665 ft/s •.243 Winchester (58 grain): 4,000 ft/s •.223 WSSM (40 grain): 4,700 ft/s

[@edwardabrams4972]

You forgot the 30 warbird that was made only a short time and about 100 fps faster

[@FISHH00KS]

Don't forget the 170-775 Ackley Stratosphere Nova. It's a 20 gr bullet traveling @ 496,573 fps. The parent case for the 170-775 is a 120mm x 775mm AAA. The max load was calculated at 3,976,877 psi giving it a power factor of 9,931,460

[@UI_Shaggy05]

@@edwardabrams4972 Or 300 Raptor

[@dundonrl]

You also missed the 22 Eargesplitten Loudenboomer, which is a 378 Wby Mag (or more precise a 30-378 Wby Mag) necked down to .22 caliber!

[@UI_Shaggy05]

@@dundonrl I also remembered another one: .338 Excalibur (8.6x76mm), which can launch 200 grain bullets at 3,600 ft/s!

[@bobkat1663]

30-378, 250 grain H. A-Tip , 3264 fps. , 12 lbs. rifle.

[@tripplebeards3427]

The darn brass is $2 a piece for the RUMs now! Ouch. Just wore out about 50 pieces I’ve had since 99’. There is zero neck tension. I might try and run them through my 375 RUM die and see if they crack or hold projectiles. My pencil barrel on the 300 RUM will always heat up and throw the 3rd or 4 th shot. Loaded 125 grain Nosler Ballistic tips at almost 4,000 fps with .6” groups on average with a hs prescion stock. It likes the old 180 grain Nosler partition Golds. Can get .3” 100 yard groups. Never been a tac driver but it’s taken some nice bucks and few huge black bear.

[@tripplebeards3427]

Accuracy wise the 300 RUM will beat it. The Weatherby has a free floating throat so you can’t load it to the lands. The RUM you can.

[@ReloadingWeatherby]

Thanks for sharing

[@michaeldavidblunt]

​@@tripplebeards3427my 30-378 is sub moa all day long. Puts sub moa groups out to 300 yards consistently and is a joy to sit behind. Put the time in and any rifle can be accurate.

[@tripplebeards3427]

@@michaeldavidblunt yep, most that have owned them have shot 4 boxes of factory ammo through it and informed an opinion to tell the world.

[@bkb5668]

I am glad I own the .300 rum and .375 rum and not the weatherby versions. Weatherby is over priced rifles and ammunition. I do own a couple vanguard weatherby rifles and love them, I just can't stomach the cost of a mark v. I might buy the wife a Camilla mark v in .280 AI for elk. Thanks for the videos!!!

[@ReloadingWeatherby]

Isn't the RUM ammo about the same cost though? I agree the Mark V rifles are too expensive.

[@ReloadingMoreAD1966]

Great Content sir. Just subscribed. Echo's sent me over from the live chat. 🥇

[@ReloadingWeatherby]

Thank you!

[@scottquenstedt1]

I hear of people loading the RUM with 230’s and 245’s well into the 3100FPS range. Makes me wonder what someone could push the 30-378 to. With a super long custom chamber, and hand feeding incredibly long rounds like a 245 EOL, the powder capacity of the 30-378 is quite incredible. I also want to see a 6.5-378. Or at a minimum, a 7-378.

[@ReloadingWeatherby]

Go check out Mark and Sam after work. They have a custom 30-378 Weatherby, they were shooting the 245 gr Berger and 250 gr A-tip. They were getting 3250 FPS with the 245 gr and 3200 FPS with the 250 gr.

[@dundonrl]

Well, 20ish years ago Barnes made a mistake in one of their reloading manuals and had them 10 grains of powder heavy on the 30-378 Wby Mag. My brother had some loaded and in his Sako TRG-S when he touched it off it case hit the bolt with so much energy that you couldn't see anything on the back of it except the imprint of the bolt (writing etc was gone) and the primer was vaporized! I'd have LOVED to seen what the velocity was through a chronograph, but I guarantee you it was FAST! (didn't hurt the rifle either)!

[@RockyMountainThugs]

Watched my dad shoot a 200 grain Berger 3400 fps in a compressed load out of his 300 rum with a 28” barrel when we were figuring out some loads for his gun obviously we’ve come down from there but insane how fast this thing can push big pills

[@ReloadingWeatherby]

Wow

[@brettmakoviney7120]

My dad once had a box of 110 grain 300 WeaTHERBY..

[@texpatriot8462]

Good one, but I would pick the two cartridges you showed that don't have belts. Sansabelt is the future 😁

[@gerry6.8]

I could have bought one of the nicest guns ever made by Remington in left hand, the LSS stainless but the RUM cartridges were more than what I wanted to shoot. I knew a guy with one of those LSS rifles in 338 RUM and it was a very nice gun. Probably would have chose the 338 over the 300. The 300 Wby is as big as I would want to go personally and think the 30 Nosler is the best of them all.

[@14goldmedals]

I own the Rem700 LH LSS in 300 Rum. Factory 26" barrel w/KDF brake. Action and recoil lug bedded in Devcon steel infused epoxy, barrel channel. Trigger-Tech Special trigger set at exactly 1.5 lbs. She'll shoot 3 180 grain Accubonds into 3/4" at 100m (110 yards) going 3350 fps from the muzzle. The velocity edge goes to the big 30-378 Wby with handloads. One of the prettiest rifles out there. I also own a Weatherby Mar V LH in 378 Wby. It's Magna Ported, the porting looks hi-tech but does very little so shooting .375 300 grain Sierra boat tails is always an adventure lol

[@leepinkus1891]

Ook at the Lazzeroni 7.82 Warbird

[@ReloadingWeatherby]

I'm aware of it. I wouldn't consider it a factory cartridge though. It does best both of these

[@norrisdillahuntjr4570]

And its about 2k more expensive

[@markcox2870]

Another great article / video.

[@ReloadingWeatherby]

Thanks Mark!

[@dustindias645]

I shoot 200 accubond in my 30-378 and its take 118 grains of powder to get over 3200fps and thatz a max charge i get same speed with same bullet but only 92 grains of powder from my 300 rum so i dont really shoot my 30-378 it definitely needs a longer barrel

[@ReloadingWeatherby]

Yes it does need a longer barrel. Thanks for sharing

[@user-wo9uk5do5w]

300WBY.200GR нослер акубонд.ходгон 1000.84гр.покозал скорость960мс.уэзерби марк5

[@user-wo9uk5do5w]

300WYB. Порох нужен релодер33.лутче рамшот LRT.он более медлений.твист9.длина ствола28дуймов.и пули.алко булет.230гр 240гр.

[@user-wo9uk5do5w]

Гильза хорнади хорошего качества и гильза федерал тоже хорошоя.гильзы производства уэзерби пхое качество.нерекомедую ими пользоваться.проверено много раз.нослер кастом тоже очень хорошие.

[@jamespmullin21753]

Remington, Winchester, Hornady all introduce new cartridges the desert them in about 10-20 years. Remington usual mistake is under loaded huge cases or inadequate barrel twist rates. The 8 mm Remmag was anemic with a 185 gr @ 3080 fps mv . This could have been a 185 @ 3300 or 3400 fps mv. There was a 200 ( or 220, but probably 200 ) gr @ I think 2800 +. It could have been 3100. Bring a lot of these cartridges back with a few tweaks and fix those really good calibers. If the 7mm-08 can make it the 280 Remington can. Match the 30-06 energies but with a 140, 160 and 180 gr bullets. Also the 35 Whelan should be a standard cartridge , it's been waiting forever.

[@jamespmullin21753]

Neither are better than the 300 Weatherby mag . The 30-378 is a joke, the ammo costs well over $100 for 20 rounds. 300 Weatherby can be had for $70 for 20 rounds. 30-378 only goes 200 feet per second more than the 300.

[@ReloadingWeatherby]

I would never buy factory ammo for the 30-378 Weatherby. But with me owning a 300 Weatherby I don't ever see myself getting a 30-378.

[@mikescandrett967]

Reloading this makes it very affordable if this a concern, reality is ammo cost is of no consequence on a hunting trip . Fuel, food , etc is what costs when hunting. Having shot well over 200 animals without ever losing a animal wounded is why I still use one.

[@cw2a]

Another good one man!!

[@ReloadingWeatherby]

Appreciate it!

[@jk-kr8jt]

Remington was a little late to the 30 caliber game. Come on now RW. Did you forget the 30 Remington? That's OK the world forgot it, back before WW II. But it lead us to some good places.

[@ReloadingWeatherby]

I should have said 30 Caliber magnum

[@jk-kr8jt]

@@ReloadingWeatherby right, i knew what you meant. Just had to get a historical reference to a long forgotten cartridge. Have a great one.

[@johnwilburn8319]

Sir I'm so glad you mentioned the poor old forgotten .30 Remington.I think the .300 Savage outsold it because of the model 99.I remembered shooting a semi-auto .30 Remington as a kid but I don't know the make of it.I remembered it being very accurate for an old semi.

[@jk-kr8jt]

​@@johnwilburn8319 hello John. That rifle was probably a Remington Model 8 or later on a Model 81. Sleek like family of rifles that paved the way for the lines of semiautomatic rifles that followed from Rem, Winchester, Browning and so on. In reality the Model 8 really also paved the way for the slide action (pump) rifles that followed. Sadly I think the slide action is dead now adays. The semiautomatic market is alive and well thanks to the AR, but the 8,81, 740, 742, market is in the history books. I wholeheartedly agree with you that the old Savage 99 in 300 Savage is a classical little darling. I so wish that with modern CNC machining some of the old classic like the 99, 8, 14, 71, just to name a few would come back to life. It's just a dream, but we are allowed to dream. Have a great day. Cheers, Jeff.

[@AtteL]

I have project Sako TRG-S M995 30-378 and I swap orginal 26" barrel to Lothar Walther 32" stainless barrel. Twist is 12" but I hope that is enouhgt for 150-180gr bullets and I can get increase speeds up to 100fps. versus 26" barrel.

[@ReloadingWeatherby]

Sweet! It should stabilize 180 gr

[@jeffdunn7060]

love my 300 rum

[@ddubd3771]

Subscribed from Echos channel, I’ll have to check out your vids

[@ReloadingWeatherby]

Thanks

[@timmcfarland3311]

Can’t really go by the book. You have to set it up for maximum performance I have. 33” barrel on my 300 RUM and it pushes the 245 grain Berger bullets at 3150FPS

[@AlaskanBallistics]

that's a lot of ft lbs at 1000 yards.

[@ReloadingWeatherby]

Yes it is

[@KK40384]

I’d like to see how it stacks up against the PRC with heavy 245-250gr bullets. Obviously no factory option for either but I know at least one of them can shoot them.

[@ReloadingWeatherby]

Both the 300 RUM and 30-378 WBY would need a faster twist rate.... unless you were shooting them at like 8000 feet above sea level. Mark and Sam After work have a custom 30-378 WBY with a 31 inch barrel. It shot the 245 gr Berger at 3250 FPS and the 250 gr A-tip at 3200 FPS.

[@KK40384]

@@ReloadingWeatherby well yea I’m a custom rifle with a long barrel. I’d like to see a 8 twist barrel rifle in 26” with a SAAMI spec chamber in 30-378 shot the heavies against a PRC. If I had to guess given the right twist rate they’d be pretty close but with the PRC biting way less powder.

[@ReloadingWeatherby]

@@KK40384 I expect it to have a 200 FPS advantage over the PRC with a 26 inch barrel. But it really needs a longer barrel to take advantage of the powder capacity

[@KK40384]

@@ReloadingWeatherby I seriously doubt 200fps with bullets that heavy. I’m shooting 250s at 2950 out of a 26” 1:8 and 245 slightly faster. I doubt you can get 200 fps higher with the 30-378 out of a 26”. Longer barrel no doubt. It’s got plenty of powder to burn. It’s a great cartridge but not very versatile in my opinion. Wanna shoot mid weight bullets fast and blow your shoulder out then you have your top pick. It’ll lay down any game you. An find in North America without a doubt.

[@jimklemens5018]

@@KK40384 That's why I use a 31" barrel.

[@scottterry1659]

While stuff like this neat, with the exception of long range target , shooting , how often do you need the speed for hunting ?

[@ReloadingWeatherby]

Just for bragging rights

[@flatoutautomotive]

I took 6 deer at various ranges from 70-370 yards in about 4 min with a 6.5-300 WBY this year. My friend didn't even know what I was shooting at, he thought I lost my mind.

[@SSgtBlueUSMC0369]

Is it possible to get that Excel spreadsheet from yeah. I would really like to look at a few more of those caliber and the numbers. I’m still trying to make up my mind on a new stick.

[@ReloadingWeatherby]

It's possible, just give me a day or so to put it into a Google Sheet. What cartridge are you thinking of getting?

[@SSgtBlueUSMC0369]

@@ReloadingWeatherby So I’m looking at the 30 Cals for hunting. I looked at the 7mm PRC and also the 300 PRC too. More companies are building sticks in them now it seems but I’m not one to jump on the ban wagon to speak of. I’m really leaning to the 300 Weatherby for hunting because we’ll it’s a 300 bee and it’s tried and true for sure. 300 PRC might be in the running bit well see. I’m not really going to bang steel for say just hunt game is what I’m after. 300 Win is a possibility but we’ll see.

[@ReloadingWeatherby]

@@SSgtBlueUSMC0369 I love my 300 Weatherby. I'm getting pretty incredible velocities with it. It basically matches a 300 RUM

[@ReloadingWeatherby]

Send me an email and I will share the excel sheet with you. [e-mail]

[@user-ku3is1on8n]

I've got a 300 WEATHERBY and it will shoot the 168 3400 FPS the Fourth edition HORNADY book has a load for it going 3400 FPS.

[@ReloadingWeatherby]

Nice!

[@davhuf3496]

BOOOOM!!

[@ReloadingWeatherby]

Two big booms

[@14goldmedals]

Shak-a-lak-a!

[@musvijajuzagrilariocara8583]

Could’ve probably thrown 300 Norma in this video too

[@ReloadingWeatherby]

True

[@mikegonzales6871]

I would like to pick your brain about the 30-3 8 Weatherby I just ordered that in the back country carbine and I cannot find your email. Could you please provide it to me thank you, Mike.

[@mikegonzales6871]

30-378

[@ReloadingWeatherby]

[e-mail]

[@warriorwarrior6999]

30-378 Weatherby mag is the king of all 300 magnums.

[@ReloadingWeatherby]

Yes it is!

[@user-wo9uk5do5w]

Да это так.

[@BradleyAdams-nj5hc]

Barely.

[@jamespmullin21753]

378x99

[@craigleibbrand7761]

Anything more or above the 300 Weatherby is ridiculous and not needed

[@ReloadingWeatherby]

For 30 caliber or are you talking about any caliber above the 300 Weatherby?

[@Weatherby406]

Recoil for a 30-378 in a Mark V with the muzzle brake is nothing.. Iv seen a 9 year old boy shoot one with no issue.

[@tonylegg8683]

These loads are all kinda super pretty, but when your actual bone scalp just now left your being, wtf's the difference...? Just..hey .... I'm meeting Jesus!... But wait...OH...

[@ReloadingWeatherby]

I have no idea what you just said

[@keithprinn720]

rediculously expensive with few sources

[@ReloadingWeatherby]

Yeah

[@georgiadawg9064]

No matter how hard they try nothing beats a weatherby!

[@weeman782]

I load the 300 rum in a 110g barnes going over the 4100fps mark, and that puts all those joke nosler rounds to shame

[@ReloadingWeatherby]

Impressive

[@14goldmedals]

My 300RUM sent 130 grain Barnes TTSX's @3800 fps +/- 25 fps. Connect anywhere ahead of the animal's diaphram and its Boom-flop.