Does anyone use benjamin 25 cal pellets in....

My P15 shoots them at 866fps doing 1.3" @ 53yards which is twice the group size it does with JSB's, but they do penetrate awesomely. I shot through an old, hard, 2" thick staging plank at 15 yards like it wasn't even there. That really surprised me, so I keep them handy for tough customers like porcupines. I really don't like shooting porcupines but they have damaged apple trees and the dog will never learn to leave them alone.