Quote Originally Posted by Cat 64 View Post
Do you end up doing much trimming after you fire the Lapua cases or they pretty much stay under the Max length? Are you into annealing? How many times you used your cases before you observed , if any, imperfections?
FWIW:
I bet if you get a Sinclair chamber length gauge and check your chamber that you will almost never have to trim cases.
The chamber in my 6 BR F-class measured around .030 longer than spec. max length. Pretty much every factory chamber I measure is .025 to .035 over spec.
By the time a case stretches that much from trim to length it is well worn.