Shortround6
Major General
Palma match ammo may be loaded to higher pressures and velocities. The rifles may be chamered to slightly tighter specs. The rules have changed over the years, ay one point the competitors were supposed to use NATO spec ammo + or- a certain tolerance which is were the 155 grain bullet came from. For quite a number of years the host country supplied the ammo to the competitors to even things out so at that time it didn't pay to have too special a chamber. Many countries may have slightly different rules and the "Palma" match at the National Matches in the U.S. only shares the name, distance and caliber of barrel (30 cal magnums were and may still be allowed).
The chambers may be up to the individual gunsmith. I do know in Canada at one of their matches we were issued ammo so again, you don't want to get to tight or ticky with the dimensions of the chamber. Tighter than military yes8)
The chambers may be up to the individual gunsmith. I do know in Canada at one of their matches we were issued ammo so again, you don't want to get to tight or ticky with the dimensions of the chamber. Tighter than military yes8)