I was patterning my 16ga SxS flinter and would sure like a way to change the POI. Both barrels are shooting about 7" right now at 30yds. I would also like to bring the POI up about 5". Heck while I am at it, is there a barrel man that can not only help me with this POI but jug choke it as well? Who do you suggest?
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Changing POI
- Thread starter Dave K
- Start date
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Dave, Mike Brooks posted this guys info, and I used him to jug choke a new GM .62cal Flint smoothbore, works great...don't know if he can alter POA but he sounde like he was well into ML barrels, trap, skeet, etc, so I'd bet he can help...at least you can discuss it with him.Dave K said:
Lowell Tennyson
209 E Lotte St.
Blue Grass IA. 52726
563-381-3711
Ohh just bend 'em Dave. Won't hurt 'em any the way i hear you shoot. :grin: Easiest way to fix it shooting 7" off one way is to hold 7" off the other. :rotf: Seriously though, if you have the guy Roundball told you about work on it let us know how it goes.
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Dave K,
The only way to change the point of impact on a smoothie, is to bend the barrel.
There are all types of horror stories about this, but it can be done quite neatly and safely as follows.
You'll need three large "C" clamps and three blocks of wood, as well as a drill index.
Figure out which way you are going to bend it, clamp it to a sturdy bench, and mark the block locations with a grease pencil or crayon, etc.
Mark a spot in the center of the barrel to set the third block, there needs to be some clearance between the third block and the barrel. At that point, insert the largest bit, like you would a feel gauge. This will give you a reference to see how much the barrel has been bent.
It's kinda guess work from here, but not really all that hard.
Proceed to bend the barrel by putting pressure on the center clamp. You will need to over bend considerably, as the barrel will spring back.
Once you've bent it, say a 1/16th of an inch, put it back in the stock and fire 3 shots to see where the POI has moved.
You will have to re-bend and re-shoot as necessary.
Remember, bend in small increments. It really does work. :winking:
Hope this helps. :v
The only way to change the point of impact on a smoothie, is to bend the barrel.
There are all types of horror stories about this, but it can be done quite neatly and safely as follows.
You'll need three large "C" clamps and three blocks of wood, as well as a drill index.
Figure out which way you are going to bend it, clamp it to a sturdy bench, and mark the block locations with a grease pencil or crayon, etc.
Mark a spot in the center of the barrel to set the third block, there needs to be some clearance between the third block and the barrel. At that point, insert the largest bit, like you would a feel gauge. This will give you a reference to see how much the barrel has been bent.
It's kinda guess work from here, but not really all that hard.
Proceed to bend the barrel by putting pressure on the center clamp. You will need to over bend considerably, as the barrel will spring back.
Once you've bent it, say a 1/16th of an inch, put it back in the stock and fire 3 shots to see where the POI has moved.
You will have to re-bend and re-shoot as necessary.
Remember, bend in small increments. It really does work. :winking:
Hope this helps. :v
Smallpatch, not sure if that will work as easy with Dave's double barrel.
arcticap
54 Cal.
Maybe you could experiment by placing a temporary adhesive bead either on or closer to the right barrel to improve your windage. If it helps, then you might consider having someone install a more permanent bead in the tested and verified location.
paulvallandigham
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For elevation, you can experiment with other loads, and patch and ball combinations to see if you can find one that shoots closer to your POA. For windage, you can file the front sight, or if it has a dovetail, you can move it the opposite direction you want the ball to land. So, if it is shooting to the right, drift the sight to the right, to make the gun shoot to the left. Got it?
If you still can't find a load to shoot to elevation, you can replace the front sight with a taller on, or file the existing one if you are trying to raise the point of impact. Some people will solder on to the top of the blade some extra metal to lower the impact point. I have seen this done more frequently with BP revolvers and pistol, than with smoothbores, but the principle is the same. Civil War revolvers were sighted to hit a man at 75 yds, a very long distance considering the pistol skills of the average soldier at the time. Even today, that would stretch the skills of most soldiers. When you shoot those guns, and replicas, at 25 yds, the balls hit at the very top of the target, if they hit the paper at all. Only raising the height of the front sight can bring the POI down onto the paper.
If you still can't find a load to shoot to elevation, you can replace the front sight with a taller on, or file the existing one if you are trying to raise the point of impact. Some people will solder on to the top of the blade some extra metal to lower the impact point. I have seen this done more frequently with BP revolvers and pistol, than with smoothbores, but the principle is the same. Civil War revolvers were sighted to hit a man at 75 yds, a very long distance considering the pistol skills of the average soldier at the time. Even today, that would stretch the skills of most soldiers. When you shoot those guns, and replicas, at 25 yds, the balls hit at the very top of the target, if they hit the paper at all. Only raising the height of the front sight can bring the POI down onto the paper.
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Wow Guys,
I guess I missed the double barrel thing.
Sorry about that.
:redface:
:rotf:
I guess I missed the double barrel thing.
Sorry about that.
:redface:
:rotf:
Capt. Jas.
58 Cal.
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Are you sure BOTH barrels are shooting 7" to the right? Are you left handed and not shooting off a bench? Try shooting for Point of Aim off a bench if you have not done so.
You can raise POI by raising the comb. Your eye is the rear sight on a shotgun and by raising your eye, POI will be raised. Cast in the stock can get you centered on left to right if both barrels are printing the same.
You can raise POI by raising the comb. Your eye is the rear sight on a shotgun and by raising your eye, POI will be raised. Cast in the stock can get you centered on left to right if both barrels are printing the same.
paulvallandigham
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With a shotgun, shooting only shot, It is often desireable to have the pattern center high. Because wood is easier to remove than metal, I would consider raising the height of the comb, first. There are old guns that can be found with visible file marks to the muzzles as this is another way that the patterns were moved around to regulate both barrels in a side by side. If a pattern was shooting left, they would file the left side of the muzzle so that gases would escape from that side of the muzzle first, pushing the pattern to the right. Same thing for moving the pattern up and down. Certainly do all your test firing from a bench, so you remove the human elements from the issue. Then try different loads to see if that won't move the patterns. Then I would raise or lower the comb before removing any metal. I would reserve bending the barrels as my second to last choice, simply because there are so few gunsmiths who know how to do this, and regulate side by side guns, and it is expensive. If you decide to have the barrels bent, then there would be no reason to try to regulate the patterns by filing the muzzles.
AJFedak
40 Cal.
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Dave,
Have you called the Log Cabin Shop in Lodi, Oh. They are very knowledgable and can help point you in the right direction.
[url] http://www.logcabinshop.com/[/url]
PO Box 275 Ӣ 8010 Lafayette Rd. Ӣ Lodi, Ohio 44254
Phone: (330) 948-1082 Ӣ Fax: (330) 948-4307
e-mail: [email protected]
Have you called the Log Cabin Shop in Lodi, Oh. They are very knowledgable and can help point you in the right direction.
[url] http://www.logcabinshop.com/[/url]
PO Box 275 Ӣ 8010 Lafayette Rd. Ӣ Lodi, Ohio 44254
Phone: (330) 948-1082 Ӣ Fax: (330) 948-4307
e-mail: [email protected]
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Toomuch_36
45 Cal.
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Dave K said:
One trick that has been used on doubles, usually to bring both barrels to the same point of impact, is to file a bevel across the muzzle. This will relieve the pressure on one side of the ball and pull the flight path of the ball in that direction. Ihave seen several origionals where this had been done, and talked to some builders about it, and it does seem to work.
Toomuch
...........
Shoot Flint
