Rechamber...
Would there be any reason not to rechamber a .338 Win Mag to .340 Weatherby Mag ??
Would there be any reason not to rechamber a .300 Win Mag to .300 Weatherby Mag ??
Thank you.
Doug
Would there be any reason not to rechamber a .300 Win Mag to .300 Weatherby Mag ??
Thank you.
Doug
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Length of action/magazine (to short to accommodate the OAL of the Weatherby ammo), cost of ammo and availability of ammo. I have not needed the extra power of the Weatherby cals, but I am sure others have and you can find 338 and 300 Winchester magnum ammo almost everywhere. The price is also 2 1/2 to 3 x higher for the Weatherby ammo.
Lance0 -
Doud,
Without actually checking them, I do not believe that the case head diameters are the same... which would mean a new bolt, or opening up the existing bolt.0 -
quote:Originally posted by zink
quote:Originally posted by Bert H.
Doud,
Without actually checking them, I do not believe that the case head diameters are the same... which would mean a new bolt, or opening up the existing bolt.
Bert, I believe they will . They are based on the H&H case.Actually the Weatherby's are a case head dia of 0.5315 and the Winchesters are 0.5320. The Weatherby's are 0.0005 smaller and the difference is negligible.
Lance0 -
I was thinking of a ruger #1, or other single shot rifle.
Doug0 -
.338 Win Mag is a very efficient cartridge.
Look at the load data
338 Win uses 76gr of 4350 powder on 180gr bullet to make 3281fps from 24" barrel
340 WM uses 88gr 4350 powder on 180gr bullet to make 3359fps from a 26" barrel
MAX LOADS for EACH!
Ouch!0 -
Thank you, Guys.
Doug0 -
Doug,
There wouldn't be any reason not to except you would be spending a lot more powder down the barrel for nearly the same results. But, the numbers DENWA gave are for reloading. Weatherby numbers are actually a little higher. And, they usually do make their mark...pun not intended... of velocity attained. They do that by sacrificing fine accuracy for hunting accuracy. The long leade of the Weatherby's is the key. They get a long run at the lands before they hit them and get slowed down just ever so little. Bullets are seated deep to help in that respect.
Anyhow, to the point here, you would increase velocity and therefore energy in the same bullet diameter a measurable amount. The reloading gains are there but more minimal than using original Weatherby ammo. If you use Weatherby ammo you need to make sure the gunsmith doing your conversion cuts the long leade. Otherwise pressures can be horrendous if you don't.
I wasn't an overt fan of the Weatherby's until I owned a .257 Weatherby. It was built on a Win Pre-'64. At first I didn't know what to think. I couldn't for the life of me get Bergers, Wildcats, Sierra's, Speers and even Hornadys's to shoot. But Nosler's grouped in 1/2". WTH?!?!? I kept asking....until I saw the split apart jacket stuck in my 200 yd. target. Then I realized the only bullet hanging together was giving me 1/2" accuracy. I then ran up and down the gamut with Noslers and they all performed superbly. The rifle in my opinion was never going to give same hole accuracy like some I have. But, 1/2" ain't no slouch. And with a full length barrel I chronoed factory velocities always.
-good luck with the project. If you can't spend money on gas you might as well spend it on powder.0 -
quote:Originally posted by zink
quote:Originally posted by zink
quote:Originally posted by Bert H.
Doud,
Without actually checking them, I do not believe that the case head diameters are the same... which would mean a new bolt, or opening up the existing bolt.
Bert, I believe they will . They are based on the H&H case. Actually the Weatherby's are a case head dia of 0.5315 and the Winchesters are 0.5320. The Weatherby's are 0.0005 smaller and the difference is negligible.
Lance
Right you are[^]... that is what I get for trying to rely on my memory[:(]0
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