I didnt see a section for centerfire rifles so I guess this will work.. I bought a brand new stainless Ruger mini 14 from one of my good friends..Its about 12 years old and has never been shot. when I got it, it had a bushnell 3x9 and a scope mount that screwed into the rear sight holes..I tried to bore sight it but the cross hairs would run out of adjustment before it centered the bore sighter..I put a 6x12 tasco on it and still no luck, I bought a bigger tasco 8x32 world class plus and a B-Square mount that fits on the side of the gun, still no luck.. when you get everything lined up the scope will not center with the bore sighter..finally I figured I would do it the hard way, from 5 yards I started sighting in the gun, i finally got back to about 25 yards and ran out of adjustment again..I did take the folding stock off and put the original back on but to no avail... any of you got any suggestions?? thanks!!