I bought 6 boxes of the Perfecta 40 to break in my M&P 40 VTAC today and I shot 2 boxes, 100 rounds with lots off failure to feed issues. I averaged 5 ftf's out of 10 rounds sometimes more and I couldn't hit the 30 yard steel plates consistenty at all. To see if it was an ammo or gun issue I bought some blazer steel cased ammo and the gun ran all 50 rounds flawlessly. Not only did it run flawless I was able to hit the metal plates very consistently. Almost on every shot I was able to connect with the Blazer 40. I also noticed that the Perfecta ammo was very underpowered as well. If anyone is interested I will sell my 4 boxes, 200 rounds for $65 shipped.