I have a Jebs .560 win/inv/moss threads. Im trying to sell it or keep it if I find a gun with that thread pattern that shoots well. Anybody have experience with that choke in a gun with that thread pattern? I'm shooting 7.5s/9s blend. I currently shoot an 870 with a sumtoy .562 that shoots well. Just looking for a back up gun or just to have another good set up. Was also thinking about asking Jebs to exchange it or return if they would. Any tips or advice will be appreciated. Thanks!