Ditto what Cayugad said - some bullets group well at short range and start to spread out as the range gets longer. I've never tried shooting 200 yards with powerbelts, but I know in my rifle the powerbelts group much tighter at 50 yards (sometimes 1 ragged hole) than they do at 100 yards or so. If you think you might be shooting out to 200 yards, I'd stick with the shockwaves.