40-90BN and paper patch

[Michael Johnson]

This is my first post on this forum so be gentle. I have 20 years of experience with BPCR's 45-70, 45-100, 40-65, and 50-90. Most of that has been with greasers. Three years ago Stephen Borud sent me some 50 cal bullets for paper patch and that got me off on the paper patch track. So now I have some experience with the 50, but most of my trials have been with my Shiloh LRE in 45-2.6. Now seeking to be completely humbled I have an order with Shiloh for a Paper patch 40-90BN. Initially this was meant to be a hunting rifle (Business rifle, 28 inch round barrel) then I started to think about something for BPTR (Shiloh No.1 with a 32 inch heavy round barrel). I ordered 100 cases from Rocky Mtn Cartridge when I heard they might be going out of business. I already have a ton of Starline 45-2.6 cases for my LRE. I figured I could reform them into 40-90BN. Because I thought a dedicated PP chamber was in order my initial thought was to have Shiloh do an Orville chamber with the 7 degree leade. But after reading a lot both here and on the Shiloh sight now I am not so sure.This gun will not be built for a couple of years so I unfortunately have way too much time to think about this.I do have some RCBS dies for an original chamber (.403 bullet) and will tell you that it is extremely easy to run an annealed Starline 45-2.6 case up and come out with a 40-90BN case. So no reason to pay Buffalo arms an extra buck per case for the pleasure. I am now leaning toward the standard Shiloh chamber which based on my 45-2.6 experience is already pretty tight. 0.480 at the chamber neck. I do have two questions. 1) does anybody here shoot Orville's chamber competitively and successfully. and 2) is there any compelling reason to have Kirk cut a 7 degree leade? As a target rifle I am planning on wiping between shots so some of the special fouling concerns with this cartridge are not that concerning. Thanks for any provided info and I am sure it will generate more questions. - Mike