It sounds like your hammer block is clean. :)
Here are some of the safety / hammer URLs I've archived:
http://www.surplusrifleforum.com/viewtopic.php?f=71&t=98794
http://www.surplusrifleforum.com/viewtopic.php?f=71&t=77741...
Hi.
I had similar problems.
First off, there are numerous internet discussions on the M57. Search and maintain the URLs for reference. You'll find a how-to, with pics, for taking the firing pin block apart to clean the cosmoline out of it, and you'll find discussions on the effect of the...