65BR hard as it might be to believe it, after he got home he found that the Failsafe loads did not feed from the magazine on his rifle worth a damn. Not sure why I did not get the chance to look at the rifle or ammo and try myself. Couple years later his brother took the same gun with different loads and shot a 9' with no problems. I have the Vari X 3 1 1/2 x 5 on my Whitworth 375 and think it is a good as it gets for me. Magnum Man