Semi, I have some 300 gr .451" Sierras that shot well out of one of my other 50 cals. So I may take both out next time and see what works best. Maybe I will push out to 75 yds to get a better idea. 100 yds is getting to be a bit much for the old eyes and iron sights. Maybe I can get some 6" orange dots to shoot at. I should be able to see them at 100 and draw a decent bead on it.