You did not state if you were shooting pellets versus loose powder? But anyway, the extra 20 grains may or may not give you much more speed from your gun. I try to keep all my loads at 100 grains or less. The flint I shoot 80 grains, with the 295 PB Aero tip. I have a friend that shoots the CVA Optima at 50 yards, with scope, is shooting 100 grains of Triple 7, pellets, and was shooting the 348 Hollow point. He was hitting almost bulls eye after several shots.

I don't believe the drop in charge will help you with your problem, but get's you at the 100 grain mark.

You did not state what kind of sights you have, but you know you can purchase Tru-glow sights, front and rear. Usually, I don't move the front sight at all, only the rear sight. There are screws in the Tru-glow sights I have to allow for modifications, like what you require.

Please let us know that type of sights you have. This will help....

Tom