I have both in Winchester M70s. Both have synthetic stocks and 26" barrels. Weigh for all practical purposes is the same. Recoil on the other hand is not. I can easily shoot 10 to 15 rounds from the .300 off the bench but more than about 6 rounds from the .338 mag. and I've had it for the day. I had a brake put on the .338 and it still hurts, yet the stocks on both rifles are identical. Still haven't figured out why there is that much difference. Paul B.
Because they are not the same and the reason you bought them.
Never take life to seriously, after all ,no one gets out of it alive.
