Arent these modern times and the internet just amazingly wonderful !!!
Now its common knowledge that even marlin microgroves can be cast bullet shooters !!!
But that dosent really do or say much for those of us that spent years reading, doing research and doing everything know to man (at that time) ,, before abandoning any and all thought of anything but 22's and pop-gun loads being shootable in a microgroove barrel.
Dont get me wrong,, im very happy you can enjoy cast in your microgroove barrel,, but I'll still pass on them for things with real rifling...ymmv..