A borescope will save you a lot of grief. Run several new un fired case into the chamber, close the bolt, feed you bore scope through from the muzzle and see how much the neck can grow till it needs trimming. (A base line) Once the case is a thou or two from the end of the "cut" chamber, trim all brass to that length. (trim every firing or two or as needed). This will also help to stop the dreaded carbon ring.
As for "bumping" the shoulder I like to have the bolt close with little to no pressure involved. This can be done by feel or with fancy equipment, but the whole reason to have the bolt close easily is so that you don't disturb the rifle in the bags. Other then that, a bit of pressure means nothing.
Remember two thou. is the thickness of a piece of scotch tape. So a cheap shoulder bump test is to have the bolt close easily without tape on the base of the case and "harder" or not at all with tape on the back of the case.
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Trades I would interested in:
- Sightron rifle scopes, 4.5x14x42mm or 4x16x42mm
especially! with the HHR reticle. (no duplex pls.)
- older 6x fixed scopes with fine X or target dot.
Last edited by 6.5 shooter; 04-07-2024 at 12:30 AM.
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