I owned one MGM Colt speed plate auto-popper a few years ago. It was shot extensively, but only with 9mm, so I don’t have much to say about it other than it did not break and was an excellent training aid. I would recommend getting their sniper base to go along with it.
I have been using Salute steel targets since the summer. Pending resolution of an issue, I will post a few thoughts.
[b]Although I started the shop in 1980, we entered the tactical business back in the early '90s making our LaRue Auto-resetting Sniper Targets … and we still make a few … our’s are more well-known with the long-gun folks. 
You can see 'em on our website or on the GSA-Advantage store.
M. LaRue[/b]
I keep forgetting about yours Mr. Larue… Have to add a couple of those to my list to use on the 600 yd line for my 700 LTR.
last time i went shooting my friend brought some targets that had a guy with a knife holding a little kid. i learned an important lesson: the little kid is a hostage not an accomplice.
[b]No sweat, not a lot of noise around our targets, mostly a bunch of not-too-noisy folks shooting not-too-noisy stuff - doesn’t attract a lot of attention.
ML[/b]
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And that is a very good thing. 