Ive been working on a song by Lamb of God recently. There's a passage in the song that has a lot of fast paced palm muted notes on the 2 low strings which is followed by an Artificial Harmonic. My problem is that when I'm strumming away the pick keeps moving farther back into my hand, and by time the Artficial Harmonic comes up the pick is way out of position. I don't know, mabey I'm strumming too hard or I'm holding the pick wrong?