What is the love affair of trying to turn 7mm Mausers into 7 Rem Mags?
I just don't get it...
in 7mm, I have both the 7 x 57 and the 7 Rem Mag... I hunt with the 7 x 57s, and I have the 7 Rem Mag, because it was a Savage 116 with a price that was too good to pass up on at the time...
The factory ammo chronys between 200 and 300fps slower than it does from our other rifles. Hand loads loaded all the way to max are about the same. Slow.
It didn't/dosn's sound (to me anyway) like the OP is trying to turn 1 of his 7x57's into a Magnum, but is wanting to bring it up to NORMAL 7x57 velocities, just like his others produce.
If your 7Mag was only producing 7x57 Mauser velocities, and you were wondering how to correct it, how would you feel about being accused of trying to turn it into a 7mm Ultra?
