Thread: 6.5 PRC Load Development Begins

Originally Posted by Kelton

My own little rule of thumb where these three powders are applicable is under 70gns RL26 and fed 210 over 70gn either 2225 or 2217 and fed 215 it’s not the rules but iv found it to work very well each powder has it quirks with the latter shinning when you can fit enough in a case(over 70) and a heavish for cal bullet

I'm using <70gr of 2217 in a 300WSM with 225gr ELD's and Fed 215's. <45gr in a 22-250AI and 88gr ELD's with Fed210's. <60gr in a 284WIN with 180gr ELD's and Fed210's (holy shit it's becoming clear how much of a Hornady fanboy I am). All three of these are virtually full cases and Re26 gives more velocity in all three instances... but that's kinda to be expected what with it being double based. My understanding is Re26's burn rate is right around that of AR2217 but it's a fair bit more energy dense.

But... if the case capacity allows it (which those examples do not), AR2225 is just that bit slower allowing you to add enough extra to match the speeds that Re26 offers. 6.5 PRC seems to be right at that sweet spot and running the numbers in GRT, I could push that load up to 3090 with AR2225 whereas Re26 would top out about 3060.