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Mk 19 (And all GB'ers)..Boresighter Info Request

givettegivette Member Posts: 10,886 ✭
edited October 2007 in Ask the Experts
Hi, Mk 19. givette here. Read your prior response to a boresighting question. I would like to know:

1. What collet B/S do you find most accurate?

2. After a military peep sight teardown, or a tang sight installation, can I use a boresighter, or is it mainly for glass sights?

3. Are they caliber specific?

Application: Whitworth .375/M1/M1a/M1 Carb/M1903/pump Lightning repro/M1873 trapdoor repro

Thanks for your help. Joe.
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Comments

  • He DogHe Dog Member Posts: 51,593 ✭✭✭✭
    edited November -1
    Bore sighters (collimators) are for glass sights. A small grid is etched on the glass with which you line up your reticle. The collimator is used on all calibers, but most have caliber specific spuds that are inserted into the barrel to hold them in alignment with the scope. The Zero Point Illuminated bore sighter by Leupold is magnetic and sticks to the crown of the barrel without inserting a spud over your rifling.
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  • perry shooterperry shooter Member Posts: 17,105 ✭✭✭
    edited November -1
    Most bore sighter as stated by he-dog use caliber specific spuds that fit in the bore and most have a grid with the main horz. and vertical lines set up for the sope that has it's centerline 1&1/2 inch above the centerline of the bore. Note a 30MM scope will most likely be slightly above 1.5 inches. Again I thing they have two great uses one is to get on paper when mounting new scope but IMHO the second and greatest use is after the final zero go back and look at the grid again with the bore sighter installed . Now write on a note pad I.D. of rifle and scope and where on the grid the true zero is now if you drop the rifle or ship by AIR for that once in a life-time hunt you can check to see if scope or mounts moved if you don't have time to go check your ZERO on a target or fire a rifle at your hunting site. .Your Milage May Vary..
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  • dcs shootersdcs shooters Member Posts: 10,870 ✭✭✭
    edited November -1
    I have found a laser bore sighter to work on everything so far, even iron sights.
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  • givettegivette Member Posts: 10,886 ✭
    edited November -1
    You all are giving me excellent replies! Good stuff from all! Joe
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  • Mk 19Mk 19 Member Posts: 8,170
    edited November -1
    Joe, The guys have all given great responses to your questions and Perry Shooter gave great advice and practicle uses of a good bore sighter. I personally use a BSA Boresighter that I pulled off the shelf at work, here is the exact model:

    http://www.basspro.com/webapp/wcs/stores/servlet/Product_10151_-1_10001_49670_400001002_400000000_400001000_400-1-2

    It works very well, however some of the collets are not as tight in the bore as I would like, I have prefered to use the adjustable arbor syles such as this one from Bushnell:

    http://www.midwayusa.com/eshoppingcart.exe/quickcat?SaleItemID=304939
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  • givettegivette Member Posts: 10,886 ✭
    edited November -1
    Mk 19: Thanks. Was hoping you'd see my post. And I like the links you provided. Helps a lot. Again, thanks. Joe
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  • Mk 19Mk 19 Member Posts: 8,170
    edited November -1
    No problem Joe, anything for you[8D]
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  • dcs shootersdcs shooters Member Posts: 10,870 ✭✭✭
    edited November -1
    Like MK 19 said the Bushnell spuds hold a lot tighter than the stright ones. I have both and use the Bushnell. I now use my laser most of the time, even on iron sights.
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  • NwcidNwcid Member Posts: 10,674 ✭
    edited November -1
    While not as accurate as a bore siter may be I have my own way. This will work on any gun that you can look directly down the chamber while the scope is mounted. This is good for getting on paper.

    You make sure your gun is mounted firmly. Pick out something you can easily define at about 50yrds. Look through the bore and line it up with the spot you picked out. Make sure the gun can't move and adjust your cross hairs until they are on the spot. This is not super accurate but it is free and will get you on paper.
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  • vicg1vicg1 Member Posts: 1,033 ✭✭✭✭✭
    edited November -1
    Last year I disposed of hundreds of military bore sighters made specifically for the M60. These kits were made for helicopter M60s but could be used on any .30 cal bore gun.

    First the gun is clamped down. A boresighter fit into the barrel. It was a right angle type of deal with a mandrel that went into the barrel. You would look thru the boresighter (it had crosshairs) and zero it in on a target. You then adjusted the sights on the M60 to also hit the target.

    They were purchased by the Govt at a cost of about $2k as I remember. I wholesaled most to Sarco and they advertised them in SGN for a few months until they sold out... interesting piece for the M60 shooter to have I suppose...
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