Hammer fix
Lately I’ve noticed with 25 Vulcan the 40-50 and beyond yard shots where not slam dunk anymore. Well this morning after a horrendous outing I figured I’d better look into it.
I whipped out chronograph and viola the answer was clear. First it was shooting 880-990 to start off with. Last time I checked it was 930 or so. So I took your the hammer screw and was able to move velocity around but not consistent at all. Extreme spread was 25 and then some. My 80 yard groups showed it too. So I took it apart but had to reverse drill out two of the screws holding the side plate. (thanks Zonk for the 2 spares you sent me) I took hammer out and wiped it clean. Then I noticed the one end where trigger catches hammer was sharp. So I smoothed out the edges using a drill to spin hammer and taking some cloth to the edge. 
While I had it apart I figured I might try to do something with hammer spring too
I put it to the test through chrony and settled for 920 with es of 2 with 20 shots tethered to my tank. Major improvement to say the least.
I went and did a accuracy test and it puts 3 pellets through a hole not much bigger than the pellet at 50 yards.
I’m so happy to have my Vulcan back to its usual self.
The piece on the spring is a rubber grommet that you use to insulate a hole to pull wires through. I can’t hear the spring at all. Problem is my gun got louder. Lol
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Is that still in the same state as you got it from Ernest Zonk. Or. Did you mess with it after
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Yea we got plenty of them around here too. I just shot 5 mags and all shots were 900 to 906 fps. so far very happy….. 😀
Zonk, I had an illegal do it. You know him, eManual eLabor :rofl:
Just a dremel anf its buffing compound.
I had mine out yesterday maybe I should have polished it. Lurker how’d you get it so shiny?
Here is mine before and after. It wasn’t as bad as eelect describes but I had to remove the excess silicone spray I used that hadn’t helped it.
Now to find a grommet like eelect used 💡
Hopefully that’ll solve your problem. Wish you would have taken a picture of that sharp edge also…
The hammer polishing did a good job for mine but not quite as good as yours.
I see you cut away the outer extensions of that gromet. Good Idea 💡
Does it fit loose on the hammer spring ❓
One other thing that can fix erratic velocity is to install a new breech o-ring as Zonk and I discovered.
Grommet is tight on spring you have to turn it on as you would a bolt to a nut.
I thought at first it was the O-ring but after I took a look at it it was in real good shape. I then started to go look for my problem elsewhere.
Good work eelect,
The hammer polishing did a good job for mine but not quite as good as yours.
I see you cut away the outer extensions of that gromet. Good Idea 💡
Does it fit loose on the hammer spring ❓
One other thing that can fix erratic velocity is to install a new breech o-ring as Zonk and I discovered.
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The only thing I did different was take out the main spring and replace it with one that Oak sent me. He got it from Evgeny and passed it on to me. Shoots VERY consistent now. :8: