If those kind of results appeal to you, I suggest you join the fun and try a 6BR-DX. I have authorized the following toolmakers to produce 6BR-DX reamers: JGS, Pacific Tool & Gauge (Dave Kiff), and Hugh Henriksen. While I'm pretty busy with projects now, if you have questions about the cartridge and load tuning that aren't answered in this article, you can email Mailbox@6mmBR.com and your editor can forward them to me. Best of luck to you all." —Doug Paschall
I was the guy to get Henricksen on the list, but never followed up.
I had a .269 neck turn and changed to a .272 no neck turn reamer, both from Dave Kiff at Pacific Tool and Guage. He can send (mail or email) you drawings of either or specs for a custom reamer