Make absolutely sure your bullet is not hitting the muzzlebrake on the way out. If that's not the problem try some ammo from a different source. If it still shoots low you can file down the front sight a little at a time until your rounds are landing about 1.5" high @ 100 yds. That should have you pretty close to your maximum point blank range for a 4" target out to around 250 yds. As people have said the Ranch rifle has a "Cheesy" rear sight & there is very little elevation adjustment in the first place. On mine I had to go maximun just to get on target.
Good luck
Bushwack
Good luck
Bushwack