Problems getting a .338RUM to group

[TopBuck]

Not high jacking the thread but here is some interesting info on the 338/378 -

The barrel life of expected decent accuracy is around 600 rounds. After that, barrel erosion takes over. It is a true 1000 yard gun but is somewhat punishing to say the least. I guess anything with over 5000 ft pounds of energy is brutal no doubt.

Below speaks for itself!

Weatherby factory ammo, has a 225gr Barnes TSX moving out at 3180. Holy smokes!

John your correct, but I think it's the throat that gets eroded, it can be avoided by not seating the bullet head so deep amongst other things, but I wouldn't want to shoot that thing 600 times! Thanks for the heads up.

 

[NBK]

Yup same-same. The throat is part of the barrel. Both the throat and the beginning lands get worn when this phenomena occurs. 8)