Love the Wop! I haven't always heard it, of course, close shots, or windy or just didn't hear some, but the ones I do...music to my ears! I too killed a nice muley around 75yds with a .45 Colt round from a Marlin, using that 250 XTP. It dropped the buck with a high shoulder shot, but fragmented in the spine. I foolishly traded the rifle off, but I was going to use the Buffalo Bore 320 hard cast load next. I've heard good things about that 240 mag bullet however. My 35 Whelen AI sure makes a womp sound!