My 375H&H No1 recently stopped working. The firing pin strikes the primer but the strike is very light leaving only a small indentation without firing the round. The problem started with 3 misfires that all worked on the second attempt but now it won�t fire at all no matter how many times you try. Ammo is factory Prvi Partizan and it worked fine in my rifle before.

I took the block out and cleaned with degreaser and blew it clean with some compressed air just in case the pin was catching on something foreign but this has not made any difference. How far should the pin protrude from the block face when you push on the hammer transfer block? Mine does not come out very far at all, however I don�t know how far it came out before the problem started.

Has anyone had similar problems with their No1? Could the firing pin be broken or springs worn out?
How do I get the firing pin on a No1 out to have a look at it? Any advice would be appreciated.