So, with the intent to save a family heirloom octagon barreled .22 rifle circa 1915, I decided to put a new liner in the barrel. Studied up on it a little, chucked it as true as I knew how, indicating off of spuds (don't have plug gauges) in the ends of the barrel, center drilled, drilled a start hole with a rigid stub drill, then went in deep in stages with a good .3125 aircraft length drill from both ends. Well, Murphy took over the job at this point...in the center of the barrel length where my two drillings met, I'm about .020" or .030" estimated, off of alignment. After the teardrops dried, I went on Ebay and ordered a supposedly lightly used .3125" carbide tip gundrill that is long enough to go end to end.
My questions 1. How hazardous is it going into a misaligned hole with the single point tool, are they prone to binding?
2. Machinery's Handbook suggests a much higher speed than my old lathe is capable of turning, can I get by using what I have? 850 rpm.
3. Gun drills were not intended to correct errors, so should I consider brazing a chucking reamer on a long shank to "blend" the misalignment.
My questions 1. How hazardous is it going into a misaligned hole with the single point tool, are they prone to binding?
2. Machinery's Handbook suggests a much higher speed than my old lathe is capable of turning, can I get by using what I have? 850 rpm.
3. Gun drills were not intended to correct errors, so should I consider brazing a chucking reamer on a long shank to "blend" the misalignment.
