standard deviation, Is a measure of how close each shot’s velocity will be to the "average" shot. I have tested them with my custom match rifles as well as some of my hunting rigs.
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I've reloaded quite a few rounds out of the 6.5 Creedmoor the last few years and love the cartridge.
As for equipment, my Whidden dies with the changeable neck bushing have loaded some very nice ammo. Redding dies are also a solid option.
Hornady brass has worked well. My cycle is 4-5 firings and then annealing for a reset. Primers seem to hold on as long as you don't run very hot. My loads need to work across the country and in different environments, so I run at the moderate node not the highest possible.
H4350 powder is the gold standard, and IMR 4451 is a good substitute (same recipe, but H4350 is made in Australia and IMR 4451 is made in Canada). RL17 is a good alternative as well.
I've used nearly all of the bullets out there. Lapua 136gr Scenar-Ls are probably the most accurate and consistent 6.5 bullet on the planet right now. Berger 130gr and 140gr Hybrids always deliver solid performance with nice BC numbers. Hornady, Sierra, Barnes and Noslers fall in behind. The new ELD bullets from Hornady are showing great promise in some load workups but I haven't played with too many quite yet.
As for primers, I've used CCIs and Federals as available with nearly similar performance. Between brands and various lots, I'm seeing about 10-20 fps differences. The big speed changes come from foreign primers such as Wolf/Tula and S&B.
4451, cci 200, hornady, 140 match burners. I'll let you know when my barrel shows.