I'd like to see that 5.7 in a small mag fed bolt action.
Perhaps on a Ruger 77 Mark II like the Ruger 77/22Hornet, only thing is that the ballistics of the 5.7x28 are quite similar to the .22 Hornet. It would be nice with a Ruger rotary magazine...
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"Political correctness is a belief that it is entirely possible to pick up a turd by the clean end."
Someone on the old HPFF had done the 357 Sig conversion. I don't know if he has moved to the other Hi Point forum but you might go over there and ask around.