Thanks 805ebr just wish I'd have gotten a little thanks from them but hey I just wanted to help some fella's out! went in the hole selling them BUT lots of folks got to shoot 3G without spending big bucks so it was worth it in my eyes.
I know any of the Winchester shells I never got any of the 712 or 720 to run them in any reliable fashion. A buddy of mine who is new to 3G has my old 712 and since he got it we have replaced the hammer, piston, op rod, and CZ sent him a new recoil spring and it's running rather well beside the op rod was contacting the forearm inside causing a problem BUT the trusty Dremel tool cured that. Not sure what shotgun I'm going to play with this year but probably not a CZ, not that they are bad shotguns just a bit of a bad taste they left in my mouth with the spring issue. Just remember to oil it up a little more than you think it needs, if you put on too much it'll blow off what it doesn't need Later,
Kirk