It happened to me last night. i hit a doe high in the shoulder with muzzy 2 blade. not a good shot, but my penetration was absolutely, flat out terrible. I've had muzzy's blow through shoulders at 170 fps, now i shoot 270 fps and I can't? When that deer was running away I thought the arrow was going to fall out, that's how little of it penetrated. i'm going back to muzzy.
I had a hard time recovering 2 of the 3 deer i've shot with rage.
Make the shot a good one and fear not

.