I set up my new Chrony F1 Master today at the range and fired a few Glock pills through it. My handloads for 9mm did nicely at 1100fps, 4.6 Gr. HP38 behind a Missouri Bullet 124 gr. LRN. These velocity-matched some Russian steel cased (Herters brand) 115 gr. ball ammo, so the feel of the gun in recoil was just about the same with either round. I tried these in both a G17 and a G19 and velocities were THE SAME. I had expected to see a bit more zoom from the slightly longer G17 barrel, but not so! It's good to know I'm not losing any significant bullet speed with the G19 over the G17, just a tiny bit of usable sight radius. Fun day for sure!