I ask because I messed up about 20 rounds a while ago and pulled the bullets using a kinetic puller (RCBS Pow'r Pull) and just recently reloaded them. I took them out and shot them last weekend and they grouped horribly.... The problem is I was doing load development and I am wondering if there is a chance that loading, pulling, then loading again could have somehow messed them up and maybe it was the bullets that were the problem not the powder charge? It just so happened that the last weight I tried before I got to the pulled bullets was 43.8grains which grouped great at 1.1" 5 shot group, and then the next two weights I tried, 44.1 and 44.5 using the pulled bullets grouped at 3+ and 2.5"... If it matters, these are hornady 165g SST and the powder is varget, all remington cases and CCI 200 primers.

I guess what I am asking is, has anyone ever had pulled bullets cause problems in a known good load?