In short, pretty cool! A hoot to shoot -- very little recoil (say .22 Magnum-ish), big muzzle flash and seriously loud. Forty grain bullet @ 2000 fps out of 5-inch 1911. Great performance in gellatin...I think you're starting to get up into hydrostatic shock country, but we didn't have the ultra-high speed camera on this one. Have a high-speed session scheduled in early January, and I'll run the .22 TCM on it then...I'd like to see the wound cavity develop. I also want to do some penetration tests, too...was interesting how the bullet performrped in Jello...it either fragment early in, chewing an impressive mound channel, or, in one case, mushroomed perfectly and stopped maybe a quarter-inch from completely penetrating the 15-inch block.
Gosh, might be nice to have a tack-driving bolt gun that uses the same 17 round mags, wouldn't it? Hummmmmmmmmm. I think I mentioned I got .22 TCM brass, bullets and loading dies from Fred Craig, and Hornady has a 35-grainer that should work.
And to head off the "but why, Michael?", I've been contemplating a little .22-ish project for a while now. I've looked at 25/20, .22 Hornet, .221 Fireball, .22 Jet, .256 and the 5.7 x 28. I've got a good bit of experience with the 5.7 in the pistol and carbine configs, but zippidy-do-da on the others ( well, maybe a little with the Hornet, but It has been a long whole back) When Armscor signed on with SG and I reconnected with Fred Craig after many years and started hearing about the TCM, my interest in the little .22 project got bumped up.
BTW, I have one of the new Leupold Mark AR Mod 1 1.5-4... Plant to mount it on Colt 901 .308 next week just to try it out.
Pixs on all coming?