Just getting into a bit more chambering for the odd special and research seems to show that many use a floating reamer holder to ensure perfect alignment of the reamer to the barrel blank.
After looking at a few designs I simplified it and came up with this, I just tried it out on a couple of jobs (will show in another post) and have to say it seems to work perfectly.
The idea is that the bolts holding the two halves together have good clearance holes which allow the forward part to offset by up to 0.040"
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