the 45ACP seems to be about what I have with me in the woods all the time, the 10mm's I have tried were fine I guess. The 45 has more attributes that I personally care for, low cost practice ammo, a few dB lower noise level, more commonly found on shelves, and seems to be about the same as what people are killing deer with in a 300bo subsonic, so I cannot convince myself to buy another 10. Damn near bought another 4 inch 1911 gun the other day, a used springfield champion with aluminum frame..