This is good stuff. Intuitively i would make the leap that the pack reamer and nut borer might be the same idea, however I could be wrong,.

Link references the williamsburg barrel reaming process I mentioned. Scroll down to the "square reamer"

http://www.flintriflesmith.com/Tools...rel_making.htm

The "pack" reamer seems well suited to adjusting chokes for pattern.

These reamers, pack reamers and polishing fittings needed to have the drive rod centered within the bore - I know it was done with bushings but does anyone have an illustration of how these centering bushings were set up?





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There were no bushings on any of the rods that the reamers threaded into. It was simply a long (36"ish) hollow shaft, roughly 1/2" dia, with a morse taper on one end, a stop collar that was positioned and held in place by a grub screw, and the tool end, threaded to accept the reamer. The only one that differed was the tapered reamer for .410. That reamer was an integral part of the rod.

There is a fairly detailed explanation, including diagrams, of many of these questions in WW Greener's book "The Gun". Whether it was the improvement of barrel straightening using Parson's 1795 introduction of the wire inside the barrel method or using indirect light and tissue the descriptions are quite good. Rough and fine boring bits and the use of paper in the bit to adjust the diameter are explained with sketches. A choke boring bit is also shown and the various choke methods discussed. Even though the first version was published in 1881 he updated the next 8 editions up to 1910.

Looking for something else, I ran across these.

edit: These are pictures I had saved. I no longer have the reamers

Can you explain the one on the top?

I couldn't even come up with an intelligent guess.

Just a guess; the uppermost one might be a choke burnisher that's pulled forward from the muzzle end.

This shot isn't of much help but I think the one at the top in a previous shot may be the one in the bottom left corner of the box they came in (from Charlie Parker). It certainly appears to be reverse tapered, and was probably threaded on the shank end, but I don't see pulling it with a Morse taper fitted rod, as that would have possibly pulled from the spindle.
Perhaps the current custodian, who I won't name until he jumps in, could look them over in more detail. I just don't remember the details I failed to recognize, at the time, as important. The only thing I'm certain of is where they came from, and who made them, so have no doubt where they were employed.

And I wonder why that one is the only "cutter" with four flutes where the others all have five... is there a significance to that?




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