Went to range today finally (crappy weather) to zero in my new GP100. The virgin revolver fresh in the case. Started with factory loaded 158gr lead SWC 38 special from Georgia Arms. The shots started at lower left and progressed to the inner circle as I adjusted rear site. Shot 3 groups of 6 rounds. Changed targets and used 158gr FMJ reloads from bulkammo.com. These are made by MBI. I actually like these rounds, even though the lead appears to shoot tighter groups. Oh, yeah -- shot a squirrel too! (the leg shot was me "pulling" the shot.