It is usually drag that caused broadhead to shoot lower than field points. I always sight my broadhead and test it at different yardages . Once NAP Double Cross Andrew Swat broadhead were sighted at 20 they were good out to 70. Never tried further. Grim Reapers were very close out to 70 . From 50 to 70 they were 1/2" low but I don't see that as a problem