Borden method chambering PS January 2002

W

WSnyder

New member
So as to not take the die reaming thread off in a different direction I'll post this here.

I found the Borden PS article (January 2002). He used a 6 jaw and stated it repeated to .0002”. Never said if or how the the chuck was indicated in originally. Barrel was mounted between centers and a cylindrical section was turned concentric to the bore. Barrel was mounted in chuck with muzzle located in the spindle. Jim has posted pictures of his spindle muzzle locating device on this board in the past. He then indicated along the length of a long gage pin and if it didn't indicate within .0002” he removed the barrel, cleaned the jaws and barrel then reinserted into the chuck and indicated again. If it was out the remove reinsert procedure was repeated until it indicated within .0002” TIR. The chuck was never bucked. There is more in the article that deals with bore evaluation and reaming (I'll bet the reaming methods have a lot to do with his results). Also this was early 2002 and I wouldn't be surprised if his methods haven't evolved over time.

Simison CNC'd the tenons on some barrels if I remember correctly from the PS article. I don't remember details on the chambering. Maybe I'll see if I can find the article.

Came across a George Myers article. He chambered with the headstock method, indicating the muzzle and throat.
 
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Jerry Simison does use a romi M17 cnc to cut the tenons and crowns. He then chambers through the headstock on the colchester 15x50. If you could find that article on Jerry would you let me no?

Jerry has been kind enough to mentor me since I finished gunsmith school in 2007. His influence and knowledge is top notch.

Kyle
 
Kyle, I wrote an article about Jerry Simison. It is found on p. 43 of the November 2004 edition of "Precision Shooting". At that time he preferred to use the steady rest for chambering on his Colchester. Good shooting...James Mock
 
WSnyder said:
So as to not take the die reaming thread off in a different direction I'll post this here.

I found the Borden PS article (January 2002). He used a 6 jaw and stated it repeated to .0002”. Never said if or how the the chuck was indicated in originally. Barrel was mounted between centers and a cylindrical section was turned concentric to the bore. Barrel was mounted in chuck with muzzle located in the spindle. Jim has posted pictures of his spindle muzzle locating device on this board in the past. He then indicated along the length of a long gage pin and if it didn't indicate within .0002” he removed the barrel, cleaned the jaws and barrel then reinserted into the chuck and indicated again. If it was out the remove reinsert procedure was repeated until it indicated within .0002” TIR. The chuck was never bucked. There is more in the article that deals with bore evaluation and reaming (I'll bet the reaming methods have a lot to do with his results). Also this was early 2002 and I wouldn't be surprised if his methods haven't evolved over time.

Simison CNC'd the tenons on some barrels if I remember correctly from the PS article. I don't remember details on the chambering. Maybe I'll see if I can find the article.

Came across a George Myers article. He chambered with the headstock method, indicating the muzzle and throat.
Click to expand...

That was a long time ago, nearly 10 years. Personally, I am using alot of different methods now from what I was doing 10 years ago. If you want to know if this is still the method Jim is using then it would be best to contact him personally and ask. I wouldn't be surprised if maybe he is doing things a bit different now though......????
 
kiwi smith said:
That was a long time ago, nearly 10 years. Personally, I am using alot of different methods now from what I was doing 10 years ago. If you want to know if this is still the method Jim is using then it would be best to contact him personally and ask. I wouldn't be surprised if maybe he is doing things a bit different now though......????
Click to expand...

Already said that.

"this was early 2002 and I wouldn't be surprised if his methods haven't evolved over time."

In another thread someone mentioned the article and in the interest of correct information I dug it out.
 
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From memory back then Jim Borden was using a 16x40 Victor lathe and a six jaw adjust tru chuck.........I'd have to dig the article out to be sure of that. I've also seen Jim post a photo of an adaptor he used to shorten his headstock........Kiwi
 
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