Daryl's right about sloppiness afore of the belt. Have now seen a few belted mags that the companies' seemed not to care a whit about once the thing stopped moving forward at the best. Specs all over the place.

I like the 9.3x62. My bear gun has a 16 1/4 inch bbl and still runs 285 Prvi bullets out a little faster than I pushed them in my now-all-gone 9.3x57's.