Very true, my Speer reloading manual shows the 10mm right between the .40 and .41mag as far as velocitys go. I know Buffalo Bore and Corbon far exceed these loads and get closer to .41 mag performace. Also a 180 grain bullet is about as big as you can go in a .40 due to the bullet heal of larger bullets being seated to far in the case causing bulging and feeding problems. Speer does show a 200grain bullet for the 10mm but I am not sure how big you can go with it?? I see a 10mm in my position in the future for sure.
ORIGINAL: longrifle1000
ORIGINAL: HEAD0001
The 40 S&W is so close to the 10mm. I wonder why they would do that.
They are only close when ammo companies down load the 10mm. Buffalo Bore has a 10mm load, 180gr pushed to 1,350fps which generates 728 ft-lbs of M.E.
When police departments wanted to switch to the 10mm, they complained of too much recoil for some shooters. So the ammo makers loaded it down to accomodate them. Then the 40 S&W came out and was giving them the same results as the mild 10mm rounds in a smaller package.
But loaded up to it's potential, there is no comparison really.