By surfing around in this forum and also throught other sources, I came out with some considerations about the reloading of 10mm auto that I'd like to share. Please comment and tell me if something's not correct. - Max SAAMI pressure for 10mm Auto is set at 37.500 psi - Currently there is no official 10mm Auto +P cartridge. I suppose that the reason is that having a large primer, the case is not strong enough (the edges of the bottom are slim) to handle higher pressures. Is there any manufacturer that produces 10mm Auto cases with the small primer? Would it then be possible, with a small primer, to increase the max pressure? - It is agreed that is is NOT recommended to shoot full-power loads (that may exceed SAAMI pressure) in a stock "low-supported chamber" glock barrell, but to use an aftermarket more supported one. In this regard, I've noticed, in the Hodgdong reloading chart (http://data.hodgdon.com/cartridge_load.asp) for the 10mm Auto, that: a) Even at max loads, you never reach the 37.500 psi limit b) At max loads, the slower the powder is, the lower the pressure is (as a rule of thumb) c) The IMR 800-X, still being the second-best together with the Longshot, is the one with the LOWEST max pressure. At full loads with 200gr ball, it is just 32.500 psi, so with 5.000 still to go. This means that with the 800-X you could "safely" go a bit higher than the recommended max loads. Any comments from you folks?