Basically, with the top of the front sight even with the top of the rear blade there is a difference of .068". With 50yds (1800") / 23.375" * .068 = ~5.2". That means when your sighted on the target the barrels are pointing 5.2" above the target center. That seems quite reasonable. But as you know your bullet impacts are quite a bit higher which would indicate the muzzles must be recoiling up due to recoil before the bullets leave the barrel muzzles.
I would try the lighter bullet and get the velocity up a bit higher. And experiment with the sight hold relationship between front and rear.

Last edited by LRF; 03/18/22 03:38 PM.