Cap and ball revolvers shoot most accurately if the wedge is tight in the frame.
If you can remove it by hand, it's too loose.
Years ago I learned how to determine the "sweet spot" on a cap and ball wedge:
1. Using a nylon-faced hammer, or chunk of hardwood, tap the wedge in while rotating the cylinder.
2. When the cylinder begins to drag against the rear of the barrel, stop!
3. Now, tap the wedge out very lightly, just a few taps, so the cylinder no longer rubs against the rear of the barrel.
4. This is the "sweet spot" in Colt designs that will aid accuracy.
From what I've been reading on the web for the past six or even years, Palmetto has severe quality problems. In fact, I've yet to find one post of someone praising it.
A few years ago, Palmetto offered a reproduction of the Colt 1855 pocket revolver. Many were excited about this because this design is full-frame, with the frame surrounding the cylinder like the Remington.
Well, shortly after it was available I began to read horror stories about Palmetto quality. The theme was the same: avoid this garbage.
I've yet to see a kind word about Palmetto since.
Heck, I've heard so little about Palmetto the past few years that I thought the company was dead. Guess not.
Make your own decision, but from what others have posted I'd avoid anythiing made by Palmetto.