Hey fellas. Ive looked through a few pages of backlogged threads and didn't find what I was looking for. I've been reforming LC 1969 .30-06 brass into 7x57mm for a little bit now. I bought a 5 gallon bucket of .30-06 brass for a few bucks because I can use that to form 7.7 Jap, 7.92x57mm, 7x57mm, and 7.62x51. I sorted about 80 cases by headstamp specifically for my Brazilian Mauser. Ive been working on loads using 175gr bullets, 168gr bullets, and probably today, 139gr bullets. Im interested in recreating military spec ammo so the rifles sights are properly calibrated for the ammo I make. Ive been looking for a 7x57mm load using CFE 223 because Im sitting on an 8lb jug of it. Ive found 7mm-08 load data using CFE 223 but nothing for 7x57mm. While 7x57mm and 7mm-08 have almost identical ballistics, they operate at different pressures. Around 60k psi and 56k psi respectively.
This is my question: if a case with a lower advertised MAP is formed from a case with a higher MAP (forming 7x57mm out of .30-06), will the ACTUAL max average pressure of the newly reformed case be higher than a factory produces case of the same type, or what? Would you be able to bump up the pressure a little bit in a 7x57 formed from a .30-06 compared to a factory 7x57mm?