Green Mountain Nipple?

[Cowboy2]

Anyone know what brand GM was using, or was it something made in-house?

Reason I ask is, I picked up one of their barrels a while back, and it shoots Rem #10 caps just fine. I should be getting a re-bored barrel back from Bob Hoyt in a week or so, and since I have a ton of #10s, the one from the factory looks worn, and #11s seem to be in short supply at the moment, I'd like to swap over.

 

[necchi]

The thread is a 1/4 x 28.
As far as getting a #10 to fire with it,, it's just a matter of chucking it up in a drill and filing/sanding the nipple circumference down to size.
Be sure to chuck the shoulder of the nipple not the threads, :wink:

 

[Cowboy2]

That solution is too simple, sensible, and (presumptively) effective. You are clearly a bad person of evil designs who has chosen to take it upon himself to bedevil me by making my life simpler.

But I ain't falling for it. Nope, I want suggestions that cost me more money, time, and effort.

 

[M. De Land]

You can go ahead and chuck up on the threads with out harm to the nipple if you don't go Godzilla on the key to tighten them in. Have done it many times in lathe, drill press and hand drill without problem. They'll be centered better, give more room to work the cone and it's an easier set up. Mike D.

 

[bpd303]

I chuck em on the threads too, just take it easy and I use a fine file to fit them. Been doing it like that for years and have yet to mess up the threads.

 

[Cowboy2]

Thanks guys.

 

[Leatherbark]

Pretty certain GM used Spitfire nipples. I think they were made by "Knight" who is out of business If I remember correctly. Is your nipple anodized Red?

Bob

 

[Cowboy2]

Its not red. If memory serves, its black (not blued). I'd go check, but I've got a mountain on my plate today.