I'd agree with Geoahhh:
I own 2 rifles in 300 Savage. A Remington M81 and a Savage 99. I use reformed machine gun brass in both. I do turn the necks so there is no "thick wall" at the bottom of the necks, where the new 300 SavAGE neck is being made from the top of the old shoulder of the 7.62 NATO brass. This is critical in the Auto.

But I have never had a single problem with either rifle using well made brass.

The body of the shell from head to shoulder of both the 300 Savage and the 308 are effectively identical. So my guess is that something is amiss with the case formed from the 308, but without seeing the gun and ammo I can't say what it would be. But you say using 300 Savage brass it works, so the process of elimination shows something is different in the ammo, not the gun.


Try smoking the shell up to the necks and base of the bullets. When you run them through the action you may then be able to see the rubs, and tell if it's a problem with case forming.

Last edited by szihn; 06/30/22.