^^^^^ +1
Thanks, Hawg.
With a correct arbor-to-barrel-lug-recess fit, one needs not to "hammer" in the wedge as the cylinder/forcing cone fit/gap is not dependent on the wedge position in the arbor slot.
A properly fitted wedge will allow the arbor to be seated against the bottom of the recess and it will not pop out upon firing if the right side of wedge spring protrudes enough to catch the right side of the barrel lug. It will also be able to be seated in the slot with firm thumb pressure and will be able to be removed without tools by depressing the wedge spring at the same time as pushing the wedge to the left.
I have 3 Pietta 1851 Navy .36 type pistols (2nd Model, 3rd Model, and G&G) with good arbor fit (from the factory) that are capable of this, after I fitted the wedges.
Goon (Mike) may disagree somewhat with my take, but he is the master, IMO, to perfect C&B revolvers. If you send your pistol to him it will come back with perfect timing, proper arbor fit, probably a cap post, and other wonderful things. I would send my three in but I don't have the extra funds that some of you younger folks have.
If you give him a phone call, and he has the time, he will talk your ear off with free info. He is that nice of an experienced guy. If so, PAY ATENTION and take notes!
http://www.goonsgunworks.com/
Jim