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I’ve been working on reloading .308 subsonic rounds with Red Dot and Clays powder. I’m looking to get around 975fps-1000fps with 170gr-190gr projectiles. When shooting a string of 5 rounds (same powder charge, primer, seating depth, etc.) I am seeing the velocity drop on every round using a MagnetoSpeed V3. I read on another forum that when using TrailBoss the same thing occurs due to the lack of trace lube in the powder. I’ve looked all over and can’t find anything about that happening with a shotgun powder. Any help on to why this is happening? Also sometimes my first shot is 100fps or so lower than the next 4 shots and sometimes all 5 shots hold steady and I can get an SD below 10 Specs: .308 22” 1-10 twist Alpha brass Fed GM215M primers Hornady MATCH 168gr BTHP Sierra ProHunter 170gr FN (flat base) Sierra ProHunter 180gr RN (flat base) Hornady SUB-X 190gr (boat tail)

So I tried out the Precision powder because Varget was hard to find a couple months ago. I’m shooting a 308 with a 165 Sierra GameKing as a hunting load. I loaded up a ladder test starting at 41.1 and stopped at 44.1 grains. My Varget load with this brass/bullet/primer/rifle combo is 43.8 grains. However, almost all the cases were covered in soot after firing and so was my bolt and chamber. I swapped powders and the problem went away so I know it’s not my brass prep. Everything I’ve read online says that a case covered in soot means under pressure. Everything that is “advertised” says Varget and Precision are almost a substitute. I’m almost to max published charge. Should I keep bumping it up to see if the problem clears? If so then that would mean the Precision isn’t as close to Varget as they say.

Hi everyone, Just chasing some info for any noticeable differences between small and large rifle primer brass for .308. I’ve looked at Lapua, Starline and Alpha Munitions, all seem to have both options just not sure which to pick. Cheers