Imr 4895
That bullet with IMR 4895 and match primers, in either my .22-250 or .223, regularly shoots half minute of angle or less at 100 yds in either rifle. (OK, so my .22-250 isn't mine anymore. My son got his hands on it. Sorry son, I know you will read this.) My .223 especially likes them. Gophers and marmots don't care for them at all.