Free: Contests & Raffles.
It depends on what I'm trying to accomplish but I like them around 10 fps. The 22-250 that I shot in local short range BR matches years ago would shoot an honest sub .25 MOA AGG (from a factory Savage LRPV) with a lot of 5 shot groups in the .15" range. The SD on that load was 27 fps! It was tuned specifically for 100 yards though so it didn't matter. This load is from my 27 Boondoogle shooting the 170gr Berger EOL out of a 25" barrel. The groups at 280 yards were terrible with 3 MOA of vertical!I just stopped worrying about it and just shoot for groups now. If I get a load that will hold .5 MOA at 200 yards I'll go straight to shooting at 800+ and see how it does. I willing to accept that I can't always shoot well enough to blame a 10 SD for a missed shot at long range. Sometimes I just plain miss.
CreedMOOR..........
Goes to show that looking only for SD won’t mean your going to get good groups. I usually end up around 15 with a load that shoots good at 300. I strive for 1” at 300 as I know “shoots good” is a loose term. I would try some different primers, and your prep with inside of necks. Caliber up Nylon brush works good. Or dry neck lube in the necks followed by brush.