BAT DS Brass Ring?

[LTRDavid]

What is this brass ring about in this early model (DS177)? I have included a pic of a newer model DS for comparison. Thanks

 

[Larry Koch]

Could it be a Gunsmith repair job? do you know the history of the rifle?

 

[brcman]

The earlier DS models were all like that, not sure when they stopped that but evidently up through about S/N 218 were that way. The theory as, I understand it was for a snug secure mating of the barrel/action surfaces would be more secure if the threads fartherest away from that mating surface bear the most pressure.

I think it is bronze, not brass.

 

[Mulligan]

When I called Steve at BAT Machine, he said some DS actions had an M tenon.
I too had one exactly like that at one time. One of the rifles I wished I’d never sold. Bolt was crazy smooth and the ignition was great.
CW

 

[jackieschmidt]

It proved to be a solution to a non existent problem.

 

[21PHX]

A current barrel for a Bat DS or B will screw right into that actio. The first 3 Bat actions I had all had the ring.

 

[LTRDavid]

@Larry Koch re: the history, nope other than the DS stands for Dwight Smith who collaborated with BAT to develop the action modifications. The ring is there by design I just don’t understand how it is suppose to be utilized. Thus my inquiry, but I appreciate your response. Thanks

@brcman re: “snug secure mating of the barrel/action surfaces” So, the idea is to turn the tenon OD to mate with the bronze portion in a ISO H7/h6 or K7/h6 type Fit? In which case bronze would make better sense. If you have anymore information about this or where I may look I would appreciate your input.

@jackieschmidt Hi Jackie, we met at the TD.

@21PHX You’re right of course and that’s what I did on this job. My customer knew about the ring but he did not know what it was for. So, at this point the ring is an academic issue. I just don’t like not understanding something like this. Thanks for your input.

LTR out

 

[Alex Wheeler]

It was so you could fit the barrel diameter to that ring for alignment. The ring is to prevent galling which would have happened if you fit a tight diameter like that in stainless. Im glad they dropped it. I like to let the threads do their job and the shoulder do its job. No good can come from a third point like that unless everything is perfect. Which its not.

 

[LTRDavid]

It was so you could fit the barrel diameter to that ring for alignment. The ring is to prevent galling which would have happened if you fit a tight diameter like that in stainless. Im glad they dropped it. I like to let the threads do their job and the shoulder do its job. No good can come from a third point like that unless everything is perfect. Which its not.

That makes sense. I appreciate you taking the time to elaborate on the matter. Thank you Sir!

 

[Greg@wfcustom]

It was so you could fit the barrel diameter to that ring for alignment. The ring is to prevent galling which would have happened if you fit a tight diameter like that in stainless. Im glad they dropped it. I like to let the threads do their job and the shoulder do its job. No good can come from a third point like that unless everything is perfect. Which its not.

This^^^
The #1 problem I see on “BR” barrels is guys think they need a “micrometer” fit on their barrel threads. Micrometer fits are for micrometers not for SS that galls if you look at it crosswise. The longer I do this stuff the more I realize that understanding the purpose is the most important thing ie: “Let the threads and shoulder do its job”
Best advice I’ve seen on here in a long time.
I’m stealing this quote.
G