I have shot a bunch of them. They work great in my 1 in 8" twist Stag Model 6. (10 shot groups under 1" at 100 yards). And more than acceptable in my 1 in 9" twist 20" barrel, as well as a pair of 16" carbines with 1 in 9" and 1 in 8" twist rates. It has become the "go to" bullet for all our AR's. Now the bad news: My Remington 700 SPS Varmint could not keep them on the 8 1/2 x 11 target at 100 yards, despite its 26" barrel. I was hoping the additional velocity from the long barrel might be enough to stabilize it in the 1 in 12" twist, but not for me. This was with 24.5 gr of Tac and 23.7 gr of IMR-8208XBR. I have heard others claim they were able to get it to shoot in a 1 in 12" twist, but I didn't. The 62 gr SPBT is significantly shorter and did at least group, if not super impressive. (around 1.5" for 5 shots at 100 yards).
I ordered them from Graf's.