Thread: Shimming a scope

5 , 10 , or 20 MOA riser on the rail? pro: no shimming or added tension on scope , con: one extra part to worry about movement and may also lift the occular uo to an uncomfortable position......
spitballing as im no expert

yes I have seen shim jobs and they belong in the realm of Mr sledgehammer fix it f#%K ups - okay I suppose on a chinese air rifle - no keep looking - something wrong there you will find it and some great advice on here where to look

The old school non image moving scopes were a pain.
I only have one and tried it very briefly on a P14 308 ex target rifle..
Parker hale rings and bases.
These needed shimming to keep the reticle mostly centered.
I didn't try but the reticle was a long way up towards one corner of the scope.
Was told by the previous owner they had to shim the bases

Could look at the Burris signature rings with the
Shims that can be adjusted for offset
WILHELM ARMS & OPTICS Has a pair of extra high
30mm ones left on his price list
RickWilhelm@proton.me or richard.wilhelm@slingshot.co.nz
$157 last of his stuff left over from his old shop stock

Can adjust the inserts around to dial in a scope to get the most travel
Out of the scope

Burris rings are your answer, or if be inclined to ship the base(I'd it's even straight)
Swimming the scope tends to put point pressure on the tube, which I not how it should work and could damage tube.

Originally Posted by csmiffy

The old school non image moving scopes were a pain.
I only have one and tried it very briefly on a P14 308 ex target rifle..
Parker hale rings and bases.
These needed shimming to keep the reticle mostly centered.
I didn't try but the reticle was a long way up towards one corner of the scope.
Was told by the previous owner they had to shim the bases

Very old school ones used to have a wedge prism in a circular holder in the front of the scope. Turning this a certain way achieved the 'coarse' adjustment and then you fine tuned the thing using the adjustable mounts. Very agricultural, painful in fact.

I think everyone has pretty much nailed it though - if you have to shim a scope setup on a platform like that something isn't right. It should be within ballpark as soon as it's bolted up if the scope's reticle is centered and there's nothing wrong with the rest of the setup. The only times I've encountered issues like this, there has been a mechanical problem like a mismatch in components, a part not correctly mounted, something wrong in the assembly of the rifle action or barrel, or an interference in the fit between something in the mounting system.