My plunger gun must have 80gr T7 behind the 300gr SST's, and they're MOA. I'd love to get more speed, because I just found out the ballistic program prediction of +/-5.3" out to 200yds isn't true. Do you use a plunger system in any of your guns? I'm lucky in that my load happens to be using FFFg, which by the book shows to be more potent than FF.My go-to for most new rifles was always 100-125 grains 777 and a 300 SST/Shockwave. You could start at 90 grains and increase 5 grains at a time till you hit the sweet spot.