:)

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I wish you all the luck I want you to know that if you ever decide to remove your valve seat it's not a daunting task. It's like popping out a shirt button that has an oring around it with a pencil ... easy peasy!
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Thank's alot with the "secret" information it was right on time! I was having trouble and with your instructions, I was able to locate my firing pin and adjust to specs. It's always great to find all the help you need and more here especially when guys are willing to give up the info! Thanks CHUCK 
 
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Chuck, so thankful for all the advice you have generously shared with the Wildcat user community over the years. Thank you, man!

I am currently having a barrel leak issue with my WC Mk2 .22. Read in one of your previous posts that this is likely a valve seat or valve seat ring issue. As I will be stripping the rifle anyway, It is an opportunity to check on barrel to TP alignment. I would be grateful for any tips on that, Chuck. 

TIA
 
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Guys,

About the old bullet probe setting issue. I read the below in a previous post (I think by chuck)...

"Now push the depth gauge against the rear of the reloading pin…there is spring pressure from the spring inside the “reloading bar guide” (C14 on parts diagram). So then, push against the feeding pin with the depth gauge until it butts up against the rear of the breech block…and while holding pressure on the depth gauge use your left hand to tighten one and then both of the set screws on the “reload sliding bracket”. Recheck your depth with your gauge and repeat the process until you get it right. The room for error is only .25mm…so do this carefully! "

Now, when I try to do this there is no "spring pressure" from the "reloading bar guide". I have to pull the reloading bar/pin backwards with pliers. The screws on the "reload sliding bracket" are properly loosened. I have the .25 Wildcat Mk2 with 600 mm barrel. I recently installed the Huma regulator (set to 140b) with XL plenum and my muzzle velocity dropped from 240 to 180 mps. I know that on the Mk2 the probe depth is 28.9 mm.

Does anybody have any ideas about this?

Regs/L

EDIT: I tried to increase the hammer spring tension (just to have tried it) but no noticeable effect.
 
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Well, one month later here we are. I had ordered a Huma reg with the XL plenum which took 3 weeks to be delivered (coronavirus postal flu, I gather :)).
Anyway, I installed the Huma and also changed the small valve pin O-ring as well as the valve seat O-ring. Filled the Cat slowly but it was leaking heavily from the breath hole, despite my following the alignment instructions to the letter. I took the air tube apart and removed the Huma reg/plenum. On close scrutiny, it appeared that one of the two plenum O-rings (the one sitting in a groove on the plenum rim) was damaged. Interestingly, there was no replacement in the Huma reg rebuild set I had ordered (perhaps Huma would like to offer an extended reg+plenum O-ring set). Luckily, I found one exactly the same in a commercial O-ring kit I had purchased a while ago and tada, I replaced the faulty one and the Cat held pressure.

I wouldn't be able to to any of this without Chuck's expert advice he keeps sharing with us newbies and amateur air rifle gunsmiths over the last years!

Thank you Chuck!
 
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