Oh, and by the way...please do your measuring of magazine length before you get too far along. And the few extra thousandths of body diameter can complicate feeding, the gunsmith's worst bugaboo. The Brenneke is perhaps a .1" longer than the 9.3x62, and as you know loaded to about 63,800 psi C.I.P. as opposed to 56,500 for the 9.3x62. I guess I'm saying, the superb 1909 may not be the best choice for your dream cartridge.
