Shim rear sight or file front? How?

[Pete112288]

So when I put an aftermarket peep on my muzzleloader I have to have the peep so far up on the ramp of the rear sight that it hangs off the front. Then it still shoots 6 inches low at 100. I have been told that this means I need a different lower front sight. I have also been told I can file down the front and/or shim the rear sight to fix it instead of buying a new front sight. I just had a couple questions about this. How exactly would you file the front sight considering it is curved to fit the round barrel? How much can you file it without the sight screw being too long? what about shimming the rear sight? What would I use? How far can I shim it with having the rear sight screws still holding into the threads strong? How much should I have to file or shim to make up for a 6 inch difference at 100 yards?
Thank you to anyone who has advice on this.

[wildweeds]

I'd opt to shim the rear with shim stock,trial and error method,I'd start with .025 which may be to much or not enough.As to the screw length as long as 3 threads are engaged you have 100% holding power ,the rest are just extra is what I've been told by multiple machinests.You may just have to locate some longer screws of the same size and thread pattern if the shim required is quite large.

[robodad]

I had this same problem and just called Danielle at TC and she sent me a new lower front site at no charge !! Ill give you her number if needed ?

[Pete112288]

I appreciate that but mine is a Traditions Vertek so not sure if that would work. however I may try contacting Traditions, I have had great customer service with them so far.

[CP]

Via similar triangle method:
6”/3600” = H/D
Or
H = D*6/3600

Where D = the distance between your rear site and your front site & H is how much you need to adjust

[ghosthunter]

I was at the range many years ago as a novice. New scope ran out adjustment.
I talked to the Range Master he reached into the garbage can pulled out a Pepsi can and a pocket knife.

He cut out several 1/4 inch pierces and handed them to me. Shim under the scope on the back Until you get the adjustment you want.

The shims are still there 40 years later and several dee and elk.

Shim

[Pete112288]

Haha, thats awesome. was just researching the same thing. Was google-ing what the thickness of a pop can was for this purpose, figured it was at least worth trying.

[wildweeds]

Whats the distance between front sight and sight plane of the rear?I've done some math and it says your 10 degrees off,10 degrees of a 100 yard circle is 2 inch 7/16 Which is 10 degrees according to my construction master calculator. I'm not a math wizard by any stretch but the rise(drop) of 6 and the run of 300 feet net the 3600 As already posted,I then did the circumfrence of a 300 foot circle and divided by 360 to get a dimension for each degree. I guessed that your sights are 28 inches apart on the muzzy,at 28 inches of run with a rise of .050 the pitch is 10 degrees.I'd say that since 10 degrees is the minimum and .050 will get you there you need .125  which is 26 degrees to allow for more adjusting.But you never know I'm most likely in the corner with the dunce hat on here.

[Pete112288]

Yea, your right its 28 inches between the sights. Well, you lost me in your numbers  Do you have a similar guesstimate for how much I would need to change the front sight if I left the back alone? I mean so if I were thinking about buying an aftermarket front sight instead of shimming the rear, how much shorter should it be?

[Bofire]

    http://www.brownells.com/.aspx/lid=13093/GunTechdetail/Sight_Correction_Calculator



Here is a link to how to calculate sight height

Carl