I posted this a few weeks ago and I don't think some of you believed me, but man I am getting crazy velocities from my 7x57 built on a Agentine Mauser and H 4350. And I know it isn't the chrony because a 6.5x55 shot moments before was getting right what the book said it should be getting.

I changed primers from last time and velocities went up even more. 49 grains of H4350 and a 139 grain Hornady with a Rem 9 1/2 averaged 3034 and itty bitty groups. 48 grains and a 154 Hornady averaged 2925 and itty bitty groups. There were no pressure signs in any manner whatsoever that I could tell. But, dang, that is 200 fps faster than what most of you guys are saying you get with comparable loads.

Last edited by Cossatotjoe; 03/02/10.