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abintx
Guest
Jackie: Can you please explain Barrel Set Back. Why it is done ??? How it is accomplished ??? How often should it be done ??? What does it do to accuracy ??? Thanks for your response.
jackie schmidt
New member
Ab
I set barrels back about every 300 rounds or so. I do this for one reason, To keep the throat area fresh. I never change my seating depth. As to whether it is worth while or not depends on how successful you are in The Competitive Arena.
I generally set barrels back .025 the first two times, (about 600-700 rounds), on the third time, I chop the entire straight of the chamber off, (about 7/8 inch), and just start over like a new blank.
Some of the best aggs I have shot were with set-backs. When I shot those five straight "ones" at Seymour in the HV 100 last year, it was with a set-back.
Nothing shoots like a fresh throat.
The way I chamber barrels allows me to set a barrel up very quickly in order to set it back. I just true it up, run the reamer in about .025, re-cut the shoulder for headspace, and re-cut the cone. Takes about 45 minutes...........jackie
I set barrels back about every 300 rounds or so. I do this for one reason, To keep the throat area fresh. I never change my seating depth. As to whether it is worth while or not depends on how successful you are in The Competitive Arena.
I generally set barrels back .025 the first two times, (about 600-700 rounds), on the third time, I chop the entire straight of the chamber off, (about 7/8 inch), and just start over like a new blank.
Some of the best aggs I have shot were with set-backs. When I shot those five straight "ones" at Seymour in the HV 100 last year, it was with a set-back.
Nothing shoots like a fresh throat.
The way I chamber barrels allows me to set a barrel up very quickly in order to set it back. I just true it up, run the reamer in about .025, re-cut the shoulder for headspace, and re-cut the cone. Takes about 45 minutes...........jackie
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abintx
Guest
Jackie ...
How many times can you go through the three-step process you described before you have to move on to an entirely new barrel ???
Also, do you recrown at the same time you're making these set-backs ???
How many times can you go through the three-step process you described before you have to move on to an entirely new barrel ???
Also, do you recrown at the same time you're making these set-backs ???
jackie schmidt
New member
Art
Yes, I do freshen up trhe crown when I set the barrel back.
I don't know how many times I can set a barrel back. I have always thought that a barrel on a hot-rod 6PPC has only about 1200 extreme accuracy rounds in it.
They also start getting a little short. But, that being said, I have a barrel for my Rail Gun that is now 4 inches shorter than when I first chambered it 3 years ago. It is at about 19 inches now. It shoots very well........jackie
Yes, I do freshen up trhe crown when I set the barrel back.
I don't know how many times I can set a barrel back. I have always thought that a barrel on a hot-rod 6PPC has only about 1200 extreme accuracy rounds in it.
They also start getting a little short. But, that being said, I have a barrel for my Rail Gun that is now 4 inches shorter than when I first chambered it 3 years ago. It is at about 19 inches now. It shoots very well........jackie
Dick Grosbier
Club Coordinator
And unless you either do your own work or have a friend or friendly Smith that works very cheaply it is not very practical for most people.
Pete Wass
Well-known member
This is a good case for - -
Going to Grody Gritters' chambering class when next he holds it. It isn't so much the cost of the work of the Smith but the TIME involved in getting the work done and returned.
I doubt that anyone could actually see a Payoff from owning their own lathe but they surely can see a payoff by being to be able to do this kind of work whenever their fancy takes them there.
As I once saw Speedy quote on here, " God bless the child who has his own"; think he was talking about makin bullets but it applies to all of this. Nothing like being able to get what you want, when you want it, no matter how much it cose, is there?
Going to Grody Gritters' chambering class when next he holds it. It isn't so much the cost of the work of the Smith but the TIME involved in getting the work done and returned.
I doubt that anyone could actually see a Payoff from owning their own lathe but they surely can see a payoff by being to be able to do this kind of work whenever their fancy takes them there.
As I once saw Speedy quote on here, " God bless the child who has his own"; think he was talking about makin bullets but it applies to all of this. Nothing like being able to get what you want, when you want it, no matter how much it cose, is there?
jackie schmidt
New member
Pete
There is a certain amount of satisfaction in oderring a barrel from Bruno's on Monday, getting it on Wednesday, chambering it up, and heading to the range on the week end.
Of course, what I do in setting my barrels back is totally impractical unless you do your own work, or live next door to the guy that does.
But I don't make the rules. I just take advantage of the circumstances as they present themselves.........jackie
There is a certain amount of satisfaction in oderring a barrel from Bruno's on Monday, getting it on Wednesday, chambering it up, and heading to the range on the week end.
Of course, what I do in setting my barrels back is totally impractical unless you do your own work, or live next door to the guy that does.
But I don't make the rules. I just take advantage of the circumstances as they present themselves.........jackie
Pete Wass
Well-known member
I understand totally Jackie
Ergo my comments. I have a loose background in machining. In another life I worked as a machinetool rebuilder. I learned enough obout machining then to be of some danger to myself. not being one who is ever afraid to delve into the relm of not understanding all I know about something I keep thinking I can actually; with a bit of instruction, actually do chambering and barrel fitting.
Perhaps I am all wet here but I am where you are @ with what you have said. I fink the expendature of the lave is worf the satisfactun of bein able to do it.
Ergo my comments. I have a loose background in machining. In another life I worked as a machinetool rebuilder. I learned enough obout machining then to be of some danger to myself. not being one who is ever afraid to delve into the relm of not understanding all I know about something I keep thinking I can actually; with a bit of instruction, actually do chambering and barrel fitting.
Perhaps I am all wet here but I am where you are @ with what you have said. I fink the expendature of the lave is worf the satisfactun of bein able to do it.
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abintx
Guest
Everyone ...
Thanks again for sharing your knowledge, thoughts and ideas. In the past 12 months you have helped greatly with the improvement of my shooting results and equipment.
Thanks again for sharing your knowledge, thoughts and ideas. In the past 12 months you have helped greatly with the improvement of my shooting results and equipment.
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mike in co
Guest
yeah....WHAT AL SAID !
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Tubby
Guest
rechamber /setback from .262 to .269
Hi Jackie
Hope all is well your side!! I received my updated .269 reamer from PTG, (with the .030 freebore) want to rechamber / setback my old shilen barrel on my old rifle with the new reamer. Should I cut off about an Inch?? or what do you suggest?? Current chamber is .262 neck.
Many thanks
Gerrit
Namibia
Hi Jackie
Hope all is well your side!! I received my updated .269 reamer from PTG, (with the .030 freebore) want to rechamber / setback my old shilen barrel on my old rifle with the new reamer. Should I cut off about an Inch?? or what do you suggest?? Current chamber is .262 neck.
Many thanks
Gerrit
Namibia
jackie schmidt
New member
Gerrit
In theory, and in a perfect world, all you would have to cut off would be the difference in the length of the freebore of the .262 and the new .269, since there is stock in the .262 neck.
But, the World is far from perfect. Your old reamer might have a larger body dimension than the new reamer. It might not be reamed dead on as you would like.
I would cut the straight part of the chamber off, (you loose about 3/4 to 7/8 inch of length), and treat the barrel like a new blank.
Incidentally, I was at Tomball today, and I shot my HV with a barrel that I just did the first set-back on. This is the same barrel that won the South East Region HV 100 at Rachels Glenn in October with a "teen" agg.
The first group out of it was about .090........jackie
In theory, and in a perfect world, all you would have to cut off would be the difference in the length of the freebore of the .262 and the new .269, since there is stock in the .262 neck.
But, the World is far from perfect. Your old reamer might have a larger body dimension than the new reamer. It might not be reamed dead on as you would like.
I would cut the straight part of the chamber off, (you loose about 3/4 to 7/8 inch of length), and treat the barrel like a new blank.
Incidentally, I was at Tomball today, and I shot my HV with a barrel that I just did the first set-back on. This is the same barrel that won the South East Region HV 100 at Rachels Glenn in October with a "teen" agg.
The first group out of it was about .090........jackie
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RayfromTX
Guest
Wow Jackie-
you really have this game figured out. See you at the bluebonnet.
Ray
you really have this game figured out. See you at the bluebonnet.
Ray
jackie schmidt
New member
But Remember Ray,
All I do is take a couple of basic concepts and do what I can with them...........jackie
All I do is take a couple of basic concepts and do what I can with them...........jackie
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Tubby
Guest
Mr Modest....
Hey Jackie, send some of those .090's for me as well!!!!
Thanks for the advice on the rechambering, always appreciated!!!
Gerrit
Namibia
Hey Jackie, send some of those .090's for me as well!!!!
Thanks for the advice on the rechambering, always appreciated!!!
Gerrit
Namibia