I ordered one from Pacific Tool and Gauge last year. Dave Kiff made it to my specs. I had a no turn neck and wanted the throat a bit longer than the Robinette version. Not sure if you know of this site: 30BR Guide - 30 BR Benchrest Lapua Cartridge with Reloading, .308 Bullet, Accuracy, and Competition Info
You can get some ideas of the specs you might want.
I don't have a slower twist barrel like most of the 30 BR guys, it was a 308, a 1 in 10. I wanted to be able to seat 125s to 168s without the 168s seated too deeply. Both extremes of bullet weights can be placed into the rifling if desired.
I did end up skim neck turn the necked up 7 BR brass .0005" off the total OD. It sure is a fun round. I shoot it a great deal during the blazing summer months here in S. Az. and can shoot 10 shots through the heavy barrel before it gets warm, hot would take at least 15 rounds
This is the second reamer from Pacific. I like their work and will certainly use them again.