I recently picked up a CDL SF in 257 Roy from a fellow campfire member. He provided some 100 gr tsx rounds that he had made up for it that shot real well. So I needed to make up some more rounds and started at 70.5 and worked my way up to 71.5. The faster I pushed the 100 TTSX's the tighter the groups got (as I expected) But what blew me away was the velocities. Factory 100 gr Spires shot 3570 ish, the previous owners loads of 70 gr RL 22 shot 3600 ish, my 71.5 gr load clocked an average of 3800 (3780,3808,3797,3802) and showed no signs of excessive pressure. I've had a few of these and I've never clocked one that had this fast of a barrel. I have some 80 gr TTSX's I was gonna load up and was expecting to see this kind of speed with the 80's not the 100's. Pretty cool!
