I’ve been using jsb 18 grain in my fac impact for a while, and they’re very good. But just out of interest, I thought I’d try some 13.4 grain jsb exact rs. Only tried them at 30 yards for an idea of accuracy at different speeds. Well, they’re ok at 800, 850 and even 900fps, but somewhere between 900 and 980ish they look like they’re starting to lose the plot. I tried them at 1026fps but didn’t bother turning the power up any more than that, as accuracy was starting to suffer and they wouldn’t be subsonic either. Interestingly, even at 1026fps muzzle velocity they didn’t penetrate through the 3