Hello all. This is my first post and I need a little help. Just bought a used Mini 30. Took it to the range today to function check to see how she runs. Rifle operated perfectly with the exception of shooting very low at 25 & 50 yds. I ran the peep sight all the way up to max elevation, still shooting low (18 inches at 50 yds. Loads were Fiocchi 123's. Anyone have a clue??