I've read some articles that indicated the hot loads that Buffalo Bore, Double Tap, Underwood (I'm sure other manufactures as well), sells can get up to the 41 magnum level (other articels have mentioned 357 magnum level). I've also read that some re-loaders can approach 44 magnum levels. Others on here may have more info on this (or dispute it), having more knowledge than I, but that's what I've read. I was told by an apprentice Gun Smith, who loved the 10mm, that most common ammo on the market were just a bit hotter than 40 caliber rounds. He suggested the ammo manufacturers above to experience the true potential of the 10mm. I share on one thread that the Danish Greenland Patrol's, even carry 10MM pistols as their backup (they also carry rifles), if they encounter hostile Polar Bears.