.429" 300 GR BUSTER FN FB (44 MAG) PER 50 $44.56 .451" 325 GR BUSTER FN FB (454 CASULL) PER 50 $46.84 .458" 400 GR BUSTER FN FB (45/70) PER 50 $54.12 .500" 400 GR BUSTER FN FB (500 S&W) PER 50 $54.12