Re: .338-50 Talbot
I hope I'm responding to a 338 caliber bullet in a full length 50 Cal case?
I had the chance to try a 338/50 and found out it didn't do anything better then my 338/416 Rigby Imp.
As a matter of fact, it didn't do it as good.
The overbore capacity of the big 50 cal case and necked down to a .338 just didn't have it especially with the 32" barrel that was on the gun.
If you could put a REAL long barrel on the rifle and use the shorter "spotter" 50 cal case, it would be much better. I also tried one of those and the outcome advantage, still went to the 416 IMp case.
Compare it to a cartridge that will produce better velocity with LESS powder capacity.
Effecient, the 50 caliber case necked to a 338, is not. Just because it holds more powder doesn't mean it will elevate velocity.
Been there, done that.