No, no, no. Don't even get close to it with a reamer. I use brass for a 9.3X72R with a 9.3X74R headstamp very often with no issues. They were acquired from Buffalo Arms and I ask not how they were converted. But, but they have to be full length sized very closely to fit those tight chambers. We need your base, rim, etc. dimensions. I think all the answers given with the "72 D" stamp, which had a slightly wider base as 11.0mm and a rim that seems to have varied between 12.20mm to 12.50mm depending on the cartridge maker. The case has more of a taper than the average ole 9.3X72R. I see this tight chamber issue quite often due to all the variations. Just closely resize the brass full length and note those for this drilling only. Many times the same issue is seen in the 8.15X46 1/2 R target arms.
Kind Regards,
Raimey
rse
