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Offline clodbuster

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front sight height
« on: February 23, 2003, 05:26:47 AM »
Does anyone know how to calculate the required front sight height?  My rear peep is as low as it can go and I'm shooting 2.5" high at 25 yards.
I'm using a T/C factory bead front sight that's .490" from the bottom of the dovetail and .385" above the flats.  barrel is 7/8 accross the flats and the bore is .36.  How much taller a front sight do I need to zero at the traditional 13.5 yards?
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Offline savageT

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Re: front sight height
« Reply #1 on: February 23, 2003, 03:42:03 PM »
Quote from: clodbuster
Does anyone know how to calculate the required front sight height?  My rear peep is as low as it can go and I'm shooting 2.5" high at 25 yards.
I'm using a T/C factory bead front sight that's .490" from the bottom of the dovetail and .385" above the flats.  barrel is 7/8 accross the flats and the bore is .36.  How much taller a front sight do I need to zero at the traditional 13.5 yards?


clodbuster,
This may not be a scientific approach, but here's what I would do..............
Construct a front sight from a beer or soda can metal by bending the metal over the existing sight and try different heights.  Just flatten the bend to slip over the original sight.  When you find the right height for the range you want, you can make a real one from brass and solder it to the original one or purchase a replacement.  Good Luck!

Jim
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Offline savageT

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front sight height
« Reply #2 on: February 23, 2003, 03:51:32 PM »
clodbuster,
I found the formula and will print it here:

 

To decide how far to move the sight, here's a good formula - be sure to get a good caliper to make your measurements.

Desired correction (in inches) times the distance between your front and rear sight (in inches)  all divided by the distance to the target (in inches).  

Example:  to move your hit 1 inch at 50 yards with a Springfield which has a 35.5" sight radius, you'd move your sight   (1 x 35.5) / (50 x 36) = .0197 inches.  

   A good caliper would be essential in accomplishing this but you can do it!
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Offline River runner

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front sight height
« Reply #3 on: February 23, 2003, 06:33:09 PM »
Clodbuster, I'd go with a .535 Williams from Brownell's they run $10.00, You didn't say what caliber, or what distance you plan on shooting, but that should give you some lattitude. Might even get a bit taller one also, as they charge $7.25 regardless of the amount you order. I keep several different heights on hand as most dovetails I've ran into are .385. RR
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Offline johnt

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front sight height
« Reply #4 on: February 23, 2003, 07:15:06 PM »
I set down and carefully folded several layers of black tape around the front sight. I turned the rear site up about midway cause I knew Id want some adjustment when the front blade got close.
Then I went to the range with a scissors in the box.
Shot a little,cut a little,etc....till it was close.
made my measurement and checked my Track of the Wolf catalog.
The photos in the TOW buk are actual size.(handy)
If ya don't have the buk, check on-line I think the #'s are there.
All manner of sights,brass,silver,iron bead,blade,peeps
www.trackofthewolf.com
good luck,
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Offline clodbuster

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front sight height
« Reply #5 on: February 24, 2003, 07:39:51 AM »
Thanks much guys!!  All good info.  It seems I need to add 0.079 to my front sight to get the impact at the point of aim at 25 yds.  I have built a tape extension around the existing sight and will cut down to achieve good results.  This is my squirrel gun and I'm thinking it doesn't need a long zero,  maybe 50 yds or so,  whadaya thing?????
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Offline johnt

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front sight height
« Reply #6 on: February 24, 2003, 01:05:24 PM »
don't rightly know there young feller,yer gunsta havta shoot it sum ta find out fer yer ownself.
I gots mine set to 1" at a gazillion yards!!
Why, when I go squrril barkin,they jus crawl outn the tree an lay down at me feet.Thet way it's quick, an don't cost much fer powder an ball.
Have fun shootin!
best wishes,,,,
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Offline Birddog6

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Rear sight
« Reply #7 on: February 25, 2003, 12:16:44 AM »
If that is the factory sights that came with the gun I would call T/C.  If you changed the rear sight then you need to change the front sight to the appropriate sight that goes with that rear sight, again I would ask T/C or the people I got the sight from.  Another way is to adjust the rear peep to about center of it's adjustment, then put a lil piece of electrical tape up one side of the front sight & go about 1/2" up past the top of the sight pinch it together & then down the other side of it. Thus you now have a 1/2" taller front sight.  Now shoot the rifle & trim front site with sissors til correct height is found & you can measure from that & order a appropriate sight & still have the adjustment in the rear peep.
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Offline HWooldridge

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front sight height
« Reply #8 on: February 25, 2003, 08:27:28 AM »
Brownell's has a chart in their catalog that lists various distances between sights and adjustments needed to move one inch at 100 yds.
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