Last fall I bought an old Breda 710 Standard Magnum Automatic, with 3" chamber, chrome plated bore and external screw-on choke. My only complaint is that it takes a pretty stiff load to cycle it, a 1-1/8 oz 3-1/4 Dram seems to be the minimum, even with the friction rings properly set up for light loads and the mag tube oiled. I took the external choke off, making it a cylinder bore - don't try that with regular screw-in choke tubes! I've been shooting a fair bit of skeet with it. So far I'm very impressed with the old gun, it's very well made and solid.