well the mk 1 with the 40 degree was my 1st choice but the 22-243 i am curious about anyone have one? i dunno always wanted a 6mm mach6 too 8mm mag case necked down to 6mm with a 40 degree shoulder its like a modern 244H&H but cheaper i see no way to do it in a handi thou but the idea of 75gr barnes x's at 3950-4200 fps 100gr x's at 3700fps the mach 6 is a barrel burner to be sure so i picked out the cheetah it seems fairly inexpensive