i'm kind of stuck on what to do next with my .270 reloading. I am loading for a remington sps .270. I'm shooting hornady SST boattails. I've tried both 130 and 140. for powder i've tried both IMR4350 and H4831sc.

i can not seem to get a group closer then 2 inches at 100yds.

I can shooting factory corelocks at around 1inch at 100yds.

I don't have the data with me. but i took the max load in the hornady book and backed down .5 grams x5. so if it was 62 i did, 62, 61.5, 61, 60.5, 60. for each powder (with their proper max charge).

not sure what to do next, help?!