As i thought about this 215 gr 40 cal bullet seeming to shoot in a 1:30 45 cal gun the more i began to wonder if it would shoot in a 1:28 twist 50 cal gun. I have some 50 cal sabots for 40 cal bullets so next time out i am going to try that . If it shoots in both my 45 and a 50 then it will be a very versatile and very good bullet in deed for me . It would be so cool if if it did shoot in a 50 .