300 Rum or 300 Wby

I've never quite forgiven Weatherby for cutting a half mile of free-bore on their throats. It doesn't seem to affect "good enough" accuracy, but can make "great" somewhat elusive.
 
dan belisle said:
The 30-378 was developed at the request of the US Army, looking for a cartridge that would exceed 5000 fps for special purposes. With the correct powders it is as much faster then the RUM as the RUM is over the 300 Wby. FWIW - dan
Click to expand...

Great info.
Are these powders not available to reloaders? My Hornady manual shows the 300Rum and 30-378Wby as pretty much identical? And to get a 5000fps projectile they must've been going with some kind of sabot+bullet combo.

Sorry for the hijack. All this 300 wisdom....
 
the 30-378 is loaded to a lower pressure than the 300 rum , that may account for similar velocities .

the other thing to remember with these cartridges , barrel length is much much more important than the size of the case .

with the 30-378 , lets say it had a really long barrel and a light for caliber bullet ( lets say something around 100-140 grains ) .
who is to say that it isn't capable of over 5000 fps ?
 
300 win mag if your practical.
300 weatherby if you want a touch of class.
300 Ultra if you've got a bad case of little guy syndrome. (physically or mentally).;)
 
thumper1 said:
Which cal would you choose out of these two 300 Rum or 300 Wby?
Click to expand...


What is your intended purpose for this rifle/cartridge?

I think given these choices, I would go with the .300RUM, but I'd like to know what the Op wants to do with the rifle. Frankly there's one cartridge not discussed, that will do anything these will, with just a bit less velocity... the .300H&H.



bisonhd said:
300 win mag if your practical.
300 weatherby if you want a touch of class.
300 Ultra if you've got a bad case of little guy syndrome. (physically or mentally).;)
Click to expand...

That should really read, .300H&H, if you want a touch of class!



For the record, the only .300 magnum I own is a .300H&H M-700 Classic.

I would buy an original condition M-700 Classic in .300Wby, but every time I see one listed for sale, I see some idiot has bubba'd the barrel with a goddamn brake!!
 
Dogleg said:
I've never quite forgiven Weatherby for cutting a half mile of free-bore on their throats. It doesn't seem to affect "good enough" accuracy, but can make "great" somewhat elusive.
Click to expand...

When Weatherby stopped making the Mark V by JP Sauer in Germany and went to Japan for their Mark V's they also stopped cutting excessively long throats. That was many years ago...
 
Wby has used three or possibly four different throat lengths (freebore) over the years (that I'm aware of). 3/4", 1/2", 3/8", 1/4". The idea was speed, not fine accuracy. The 30-378 project used a lightweight projectile, I forget the exact weight at the moment, but very light for caliber. The correct powders for a fast 30-378 are going to be surplus 20 and 30mm powders. Thunderbird used to sell them commercially, I don't know who else does now. As mentioned, once you are burning that much powder, a long (32" say) bbl really makes them shine. FWIW - dan
 
From Wikidpedia:
The .30-378 Weatherby Magnum is a cartridge introduced by Weatherby in 1996 that uses the same case as the previously existing .378 Weatherby Magnum and .460 Weatherby Magnum, necked down to a 30 caliber (7.62 mm) bullet. It is offered with bullets between 165 and 200 grains (10.7 g and 13.0 g) in factory loading, generating velocities able to exceed 3,500 ft/s (1,100 m/s) and muzzle energies over 4,750 foot-pounds force (6,440 J).[1] The cartridge was the product of a design/development effort of 1958-1959 between Mr William L. Strickland at the U S Army Ballistics Laboratory of Redstone Arsenal Alabama and Roy Weatherby. The research development contract specified the development/production of a single shot rifle/cartridge combination which could provide a flat nosed and based, 80gr and 100 gr projectile velocity of 7000ft/s. 35mm high speed motion picture cameras were used to photograph the performance and impact results of various projectile alloys while impacting different types of armor plate. The rifle was removed from the stock and mounted in a machine rest, the armor plate targets were 10' in front of the muzzle. The results of this testing have helped the Army in the development of effective battlefield armor and armor penetrators used on the battlefield today. In later years, projectiles fired in this rifle were studied and designed for hunting game at very long distances, and for marksmanship competition in excess of 1,000 yards (910 m).
Click to expand...

There you go Dan. I figured it was a light or sabot round for that kind of speed. Hey Toomanyguns it looks like they must have had some of that magic powder you mentioned.:p
 
Dogleg said:
I've never quite forgiven Weatherby for cutting a half mile of free-bore on their throats. It doesn't seem to affect "good enough" accuracy, but can make "great" somewhat elusive.
Click to expand...


Perhaps I have been luckier than you, but every Weatherby chamber I have ever owned has been a tack driver once you fed it the right combo?

I have never seen an accurate 378Wby, but I think that is more rifle than chamber related.
 
guntech said:
When Weatherby stopped making the Mark V by JP Sauer in Germany and went to Japan for their Mark V's they also stopped cutting excessively long throats. That was many years ago...
Click to expand...

Shorter or not, they are still free bored. Normally I swap out barrels when the throat is gone. I just rebarrelled a Mark V to .300 Win Mag to get rid of the long throat and have amble mag length. Happiness restored.:D
 
dan belisle said:
Thx, my memory needs all the help it can get. - dan
Click to expand...

Dan can you imagine a .30 cal plastic sabot holding let's say, a .17 cal 25gr sleek solid carbide bullet, loaded in that 30-378 with some of Toomanyguns magic powder:p ? I wonder what velocity it might generate. You'd have to load only a homogenous bullet because a jacketed 'anything' would fly apart.

Oh and I'm still going with the RUM. Hmmm I wonder what a Ruger #1 would be like in 300RUM?
 
dan belisle said:
It hurts. Trust me. I have a 300 RUM on a heavy barreled Rem 700, bipod, heavy scope, etc, runs about 11 pounds. I still put a brake on it, it bites pretty hard. - dan
Click to expand...

My Remington 700 Laminated Thumbhole 300 RUM w/ 6500 Elite runs exactly 10lbs...
I dont find it that bad at all...Just a Big Push/Shove!!
My 6.5lb Stainless Stalker 300 wsm is 3 times as bad!!
 
You must log in or register to reply here.
Back
Top Bottom