Hey Dnk, Whatcha shootin for xbow and arrow? As I recall, think you got an Excal. Know Danny Miller? He helped me take the beast out of my Emax. Went to 408 gr. LII's, Excel string. Got me down to about 330 fps, much quieter, less vibes, more accurate, [didn't think possible] better string wear. He really knows his stuff. Told me "Slick Tricks" were "the best b-head in the world". I got some 100 gr. ASAP. I don't know about best in the world, but they are awesome. I saw a test somebody did w/ them on hog shoulder somewhere, but can't seem to dig it back up. You can look at them at www.slicktrick.net. I've found they do everytrhing that's claimed of them Regards