doublegunshop.com - home Forums General Discussion DoubleGun BBS @ doublegunshop.com Laser bore sights?

In discussing custom stocks with a few stockmakers there has been a discussion about using a laser bore sight to assist in fitting a shotgun stock. As I understand it, this is a small laser that fits in the chamber of a shotgun just like a shell. Can someone tell me where to get one? Thanks, Jake

Try Midway,scope mounting tools (boresighters, AimShot)

Regards Lennart

Don't forget chamber long axis often does not coincide with bore axis in some especially modern firearms.

And don't forget that in a double they would show the bbls cross-firing.

Man...you two guys have messed up his laser light show.

One thing a laser is good for in a shotgun is using it to mount your gun. If you draw a dot on the wall, hold your gun at your waist with the laser on the dot and try to keep it on the dot as you slowly bring the gun to your shoulder. This will teach you better mounting techniques and help your mount to be smoother. Good luck.

As the others said, putting it in the chamber would not be productive. The center of the chamber is not necessarily where the pattern center will go. Putting one in the muzzle, assuming it was a snug fit in the parallel section of the choke might be somewhat useful. I built an O/U muzzle loader and regulated the barrels with one. They were Cyl/cyl and the barrels shot to the same POI afterward. I would not trust anything but shooting at a pattern board or plate, for proper fitting of a stock.
I'll repeat the procedure, in case snyone tuned it late: Fire shots, at least three, at a measured 16 yards. Mount the gun quickly and fire, without aiming or adjusting your mount. Shoot as soon as the gun is properly mounted, when it touches your cheek(having a consistent mount is an absolute pre-requisite for this). Measure how far away the pattern center is from the target aiming point. (Aiming point is not a good choice of words, as you don't aim). For each 1" the pattern center is off, the comb needs to be changed about 1/16". Move the comb the way the pattern needs to go. Shoots low=higher comb, shooting high needs lower comb, shooting left needs comb to the right, etc.

M Yardley also discussed issues with gunfitting via laser and found that getting POI correct was a bit more involved than putting the laser in the gun.

Yea, yea. I understand that the laser is not the end game. The point is, when taking an old double gun and fiddling with the stock to find how you want to have a new one made it gives you a decent idea of where you want to go. I know that when the laser has served its purpose, one fine tunes the process with something like the good Mr. Legg has described above. For me, after the 16 yard tuning, I would also shoot a series of patterns using essentially the same technique from about 30 yards or so. But the laser should get you to the final strokes more painlessly. Jake

Friends:

I have recently used a technique shown me by DocBill.

Use a Mini-Maglite, the one intended for 2 AA batteries. Costs 15 bucks at Wal-Mart. With one layer of scotch tape wrapped around the flashlight body, it is a perfect fit in the barrel of my NID 12g. The long body of the flashlight helps keep it parallel with the bore.

Dial the light to "spotlight" and use it for mounting drills as Jimmy W suggests. I stand in the living room and use the junction formed by the ceiling corner where it meets the wall corner in the dining room as an aiming point. I do this with the dining room lights dimmed down, so the flashlight spot is readily visible. The distance is about 35 feet. It will surely help you in developing a smooth mount, as that light bobbing all over the place is a dead giveaway if you are doing it wrong.

I have found the light useful also for the stock fitting - AFTER having patterned the gun and made the major adjustments such as Jim Legg discusses.

Regards

GKT