I loaded these up awhile back. Barnes 129 LRX RWS cases BR2 COAL 3.2885" (I was in a mood!) H4350 55.3gr I never clocked it Pard, Sorry. I got way less than 3/4" with 4 rounds. Nice rounded group. I use a FCD into the last groove before the ogive, they liked to jump in this Kimber!