I use Lake City Match cases to form other cartridges. The 7.62 I make 7/08 with and 260 and 358 Win.

The 30.06 I make 6.5X06, and 35 Whelen.

I generally try to only buy rifles I can make cases for from the above "standards".

I have one 308 Win custom reamer that requires loaded ammo to have the necks turned and be no larger than .335" as the reamer cuts a .336 throat. That insures the bullet eases into the throat on firing dead center because the case neck is the same thickness all the way around.

It is not uncommon to find case neck variations of 7.62/308 cases as much as .007" which means your bullet is way off center before it starts to move.

Years ago the military teams would leave it laying for us and I was a human vacuum cleaner ! ! ! !