Need some help from the experts so I’m asking here. I have mounted my Pedersoli creedmor sight (Pedersoli USA 431)on the tang of my Pedersoli 40-65 shiloulette rifle. The sight won’t adjust down far enough (because the top curve of the breech blocks the aperture) for me to try to sight it in at 100 yards, my starting point is closer to 200-250; which makes it harder for me to sight it in and be on paper. Any suggestions or am I just going to have to suck it up and start at the farther distances? Thank you in advance.