I won’t cut those USGI FS units any more. They are collectors items. Reamed to NM spec FS I it’s can be had for $40 USD from Brownells. They are made that way these days. We used to ream them put back in the 1980’s because there was no other option.
My reamer is getting dull these days and I use it primarily for teaching purposes!
One more sleep. Packing up the tools right now
Cheers, Barney