Wait a minute, Lab...
An M-frame?
A small, 7-shot blued or nickle-plated .22 revolver?
If that's what you've got, I'll say this as loudly as I can...
DON'T MESS WITH IT!
Let me say that again...
DON'T MESS WITH IT!
Ok, here's why.
The M-frames, or LadySmiths (the ORIGINAL LadySmith revolver) are extremely collectible.
One in nearly new condition can bring well over $1,000 from a collector.
These guns are old. They should NOT be shot with modern ammunition, even standard velocity ammunition.
Because of their small size, the parts inside are rather delicate. If you mess up a part, or break a part, you'll play hell trying to find a replacement.
If you've really got an M-frame LadySmith, leave it alone and retire it to a nice, safe, comfortable place, or sell it and use the proceeds to get a couple of replacement guns.