TA DA
I fought the Annealing idea for a really long time. Then my prized 1866 TRAPPER in 44 Special refused to run with BP or Subs. With 44 Russian it would fowl out the chamber in 6 rounds and jam tight.
Then OD#3 cam strolling through one of our discussions and beat me about the head and shoulders about annealing straight wall cases. I fought that too. Then one day I up and decided to try annealing to save my 44 TRAPPER. I must admit, I was amazed. The rifle went from a job-0-matic that would not run, to spitting brass like wet grain through a goose.
It has been known for years that NONE of the straight wall pistol cases will obturate (expand) enough to seal the chamber. Especially in Uberti rifles and Rossi. The generally advised rule of thumb was max loads with BIG heavy bullets and a HEAVY crimp. NOT. That solution only reduces blow-by marginally. After OD#3 made a believer out of me, I tried annealing with ALL of my big bore straight wall cases. .44 Special, 44 Russian, 45 Colt, 45 Schofield and Cowboy 45 Special. I DO NOT have blow-by. At this time, ALL of my large bore Uberti rifles have at least 5 matches on them, with only needing to swab out the bore. After a match, all I have to do chamber a fired case, swab out the bore, eject the case, dry patch, oily patch and done.
I run light loads, light bullets, no problems. Oh, and I am a proponent of APP. I also have a CAS partner who cannot get his 38 Special 1866 to run BP. I showed him how to anneal. I await the results.
My only regret at this time, is YOUR rifle isn't MY rifle. Did Uberti include the Butt Trap for the cleaning rod?? Atz a really really nice Rifle. It can also be tuned up to run Really Really FAST.
PS: I DO NOT recommend annealing for pistol cartridges. Makes 'em real hard to eject.