I got to shoot my 50-90 with the 650 gr bullet from Montana Bullets , I loaded 100 gr of Swiss 1F and got a velocity of 1346 fps which shot into a 2.04 " 3 shot group . I know there are several factors but I was needing some ballpark moa figures or let me know where to look and or how figure. I looked at Hornady and used a .512 DGS bullet for my 1st try . Thanks