Box label states 1435 fps. I got 1280 fps, with a max about 1380. I was shooting 5y from the chronograph (which is typical when I measure velocities to account for muzzle blast). This with a 20" bbl. Remington 597 (keep in mind many .22LR have 16" barrels which account for a slightly slower velocity). I don't know what rifle CCI uses to gauge their velocities at, but they are nowhere near 1435 fps. I also did a "milk jug" test on two rounds @ about 15y. (1) penetrated 3 milk jugs, the other 4 milk jugs and at that distance they definitely mushroom, although I would call it more like a long shank with a flat cap on it vs. a true mushroom shape. The first milk jug was cracked open pretty solidly. I tried this using milk jugs last year and the first milk jug blew apart violently. This isn't a .223, it's a .22lr, but seriously - even at the slower speed than advertised, it's got a lot more power than one would suspect!