two places helped me
Loading & Shooting Paper Patched Bullets,
by R. Wright

(You need to Login or Register to view media files and links)

a repost of Brent's site

you could also ask on the Shiloh site, many PP shooters there

HTH

I think there are lots of chambers that work based on what I've seen.  I have a few rifles with chambers built with Dan Theodore reamers.  These were based on chamber castings done from an original Borchardt target rifle given to a man who worked for the Sharps Rifle Company. 

The chambers are 0.474" in diameter at the case mouth, so there is only room for a bore diameter bullet, no freebore, just an angle from the case mouth to the bore.  In this case pretty steep at 25 degrees, most advocate much shallower angles.   From 7 degrees to 1.5 per side. I'd like to try a shallower angle one day, just to compare.

My rifles shoot quite well ( I have them in .45-70, .45-90, & .45-100. )  Although they are quite picky about powder lots and granulations.   Much more so than any of my rifles that use grease grooved bullets.  I currently have a lot of Swiss Fg that they all work very well with, but I have owned lots of Swiss 1.5 that none would shoot well.       

If I were to build a new paper patch rifle for long range shooting with bore diameter bullets, it would be based on Brent Danielson's reamer as I'm curious to see how it would compare to what I've got.  It seemed to work well for him, as well as for Jim Kluskens (RIP).

Chris.

Mostly just want to try out of curiosity. I have a 32-35 Maynard that would be the trial.

Maynard and others seem to mention a special chamber for paper patch, but I haven’t been able to find out what was different.

Long range plans I would like to try a 30-30 Wesson and that would require a reamer being made. So trying to get an idea of what difference might be needed to set it up for paper patch, and if doesn’t work out, will a grease groove bullet still work reasonably well.

200 yards is probably the limit of distance for targets.

You can still shoot them very well out of a conventional style chamber if the chamber dimensions are reasonable.   

If you have no freebore then just load bore diameter bullets after full length sizing the cases.  If the bullets are sloppy in the case mouth you might want to find a way to further reduce the case mouth.  This is how I shoot my Shiloh Sharps .45-110.  I basically copied what Kenny Wasserburger does.  It works quite well.

If you have freebore, check out the dual diameter bullets that have become popular in the last several years.  Basically the rear portion of the bullet is larger so that when patched it fills the freebore, while the patched nose rides on the lands.  They aren't a tapered bullet, but a stepped one.  I haven't used these, but there are people getting good results with them.

Chris.