Thread: Odd 300 blackout loading

Always loaded my own 30 cal casts .309.

Decided to try some 208 grain Amax .308
These measure up consistantly at .308

brass inner dia .298 average then flared.

Seems like the brass is expanding quite a bit during projectile insertion.

Ive never noticed it loading other calibers with jacketed projectiles.

Fits in case gauge fine afterwards.

Is this normal or am i missing something here.