Thread: Shimming scope

Put scope on rifle and have run out of hight adjustment still 4 moa short of aimpoint , anyone ever shim before plan to shim ring not base

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but a 20 moa base on it or 20 moa rings

Originally Posted by gone-tropo

but a 20 moa base on it or 20 moa rings

To tight to buy new stuff

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its not a one turn zero stop scope is it . . struck a guy at the range the other night with the same issue, an easy fix to adjust past the stop!

If its not the zero stop its easy to shim using aluminium tape or better brass shim stock (get it from an engineering outfit, modellers also use it). Usually you have to shim the bases though or the shims move (don't ask me how I know, Talley steel rings too , you'd think they'd grip pretty hard)

Originally Posted by NRT

To tight to buy new stuff

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i see your from Dunedin . . . your Scotish heritage is showing

Try swapping the bases from front to back, you may already have MOA bases but are on backwards?

Originally Posted by rossi.45

i see your from Dunedin . . . your Scotish heritage is showing

copper wire was invented by 2 scotsmen fighting over a penny

If they are both the same bases then measure the height with a vernier caliper and you can swap them to put the higher one at the front to lift the scope. Shimming the bases is preferable to shimming the rings. If your heritage prevents your from buying some shim stock, you can cut it out of Coke cans with a pair of scissors.

Originally Posted by gundoc

If they are both the same bases then measure the height with a vernier caliper and you can swap them to put the higher one at the front to lift the scope. Shimming the bases is preferable to shimming the rings. If your heritage prevents your from buying some shim stock, you can cut it out of Coke cans with a pair of scissors.

Seen the coke trick on line mates getting me some brass shim there Leopold base and ring set can only go one way on a micro bolt browning 223

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Personally i would be finding the real problem before stuffing bits of coke cans on my rifle. Try another set of rings, check barrel is threaded straight on reciever etc

What type of rifle is it? I had a rifle which I bought new that could not be zeroed for windage.
The barrel was bowed from the factory.

Originally Posted by ChrisW

What type of rifle is it? I had a rifle which I bought new that could not be zeroed for windage.
The barrel was bowed from the factory.

Rifle is fine fourth different scope it's had on all been a smacko if anything might be scope I tweaked it up 1st and realised I didn't have enough clearance for front objective it's 56mm could not slide paper underneath so got higher rings

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Iv coke can shimmed a .22 scope with crappy rings before

made me feel dirty, dont do it

Get a canted rail and/or use Burris Signature Zee rings (with the inserts).

Shimming is very fiddly and can introduce inconsistencies or damage the scope tube if you go overboard...

Shimmed heaps of Parker Hale 26mm rings for 1" scope tubes, never had a problem.