Hey - missed seeing your post - was away for a while oon a week 1/2 road trip around the Province.

In RCBS cases with the patched undersized bullets - .451" WITH the paper patch, I used 116gr. 2F, a grease cookie and thin /-3-|" fiber wad. I used a disk of wax paper between the powder (compressed 1/10" with a home made powder compression die), then the thin card and then the patched bullet pushed in to the slightly sized case with my fingers.
I rubbed BP lube into the paper as well, but a spray with moly would also work.

In Bell cases, same loading scenario but with 122gr. 2F GOEX.

I got the idea of loading undersized bullets patched to the bore diameter from a book written by the late Paul Mathews (passed away Sept 2015). The book was called "The Paper Jacket". It works using soft bullets. 30:1 - tin to lead or 40:1, tin to lead. 2/3rds PB, 1/3 WW (crimp-on lead/antimony) also works.