People bad mouth them, but one sure saved my uncles old M12 20 gauge. I had that gun rebuilt with a Simmons vent rib, oversize safety, tightened up, re-blued and the gunsmith cut the full choke 28" barrel down and cut in a recessed choke which he said would work well. Well it didn't and that barrel was thin and before screw in chokes hit the market. A ventilated Poly Choke was my only other option back in those days, but you know what? I like it. Changing it from an open to a more closed choke out in the field is way easier than messing with a pocket full of choke tubes. I did cut the last two vent sections off of it along the way and re-blued the end and it didn't hurt it any and even made it a touch quieter. I threaten to get a Beretta o/u for beating the brush, but that old Winchester is like an extension of my arm and the partridge and rabbits dislike it a great deal.
