She's a beauty you got there for sure. I tried a double spring, but didn't seem to work. Didn't add much tension for me when the hammer was down. Didn't "kick in" until half cock. Then I got a '51 Navy mainspring and shortened it to fit. Got a better fit and a little more tension, but did not help. The cap-post made all the difference. And it seems to do more than just block the cap from blowing back. I have a theory that the cut in the hammer bleeds off a lot of the back pressure as the hammer does not seem to blow back at all now, best I can tell, and Jack had the same observation when he fired it, could not detect any blow back. And of course, the cap cannot blow back past the post anyhow. Yep I trust her now![/QUOTE
I dont know what it is about the little pocket police but everyone ive seen has been a tack driver.