I changed from some Lake City to Rem. in an '06 the cases weighed+- .5 grains and the same water cap. I don't have a chrony but the report and recoil was like I'd put a 308 load in the '06 . In the mil brass I was at a min. load that was well about as good as it gets in the field . In the Remthe shots were about 8" low at 100 . That was 3031 150 Horn. cci 500 .