No such animal.Has anyone tried any in an XDM40? what about a +P+?
+1IF a manuf. is loading to pressures greater than SAAMI, they can call it a +p or +P+ or "superdooper" or what ever, the point is, it's not recognized by the industry std. THe 40S&W is already loaded to max. safe pressure. It is one of the most often KB rounds out there. Flirting w/ over pressure loads would be unwise. Having said that, what some botique manuf, like DT are doing, is loading w/ a special powder blend that gets them higher vel. & staying within acceptable pressure levels. They call their ammo +p to denote it's higher vel. IMO, you get little trying to squeeze an extra 50fps out of a round. If you need more gas, go up in caliber.
I remember reading the exact same thing about the .380+P 3 or 4 years ago.+1
There is no SAAMI spec for +P .40 S+W.
If you look at the velocities that most of those manufactures selling +P .40 S+W you will see that they aren't any faster than standard pressure loads from other companies such as Double Tap or Corbon.
If someone is selling +P or +P+ .40 S+W it is either marketing hype that means nothing or they are loading to pressures beyond what SAAMI has deemed safe.