You will find that 80% of the reamers for LR and BR shooters are made by either Dave Kiff at Pacific tool, (541) 826-5808 and Dave Manson at Manson Precision Reamers (810) 953-0732.
Are there others just as good, probably, but these two have the biggest database and most knowledge. Especially if you are going after a wildcat. They can tell you what will work and what will not.
Strongly suggest you call and talk to both and explain what you want. You will not be sorry.