I was finally able to get my 150g SST's to shoot out of my .270. I got up at 6 am and went shooting while it was still halfway cool. I had to test a couple loads with each powder, rl-22 and h4831sc. I shot the Rl-22 loads first and they still are no good. Then 55.5g h48341sc shot a .65" group at 100 yards. Not to bad, but its a very small sweet spot. I"ve tested above and below that by .3g and if you go either way, it swing open to 1.25-.1.5. I cant seem to find a sweet spot for RL-22. I'm thinking about switching primers with RL-22. I"ve been using CCI 250 mags, I am going to try a non mag type next, dont know which, either a CCI 200, CCI BR-2, or Fed 210. I would really like to find a load with RL-22, I have a whole pound of it, and none of the h4831sc left. I'm not giving up yet, I still have 32 bullets, thats enough for 10 more loads with RL-22.