A friend of mine bought a new custom Ruger 10/22 with custom matched barrel and hogue stock. The whole set-up cost him $240. Its his first rifle and he decided to mount the after market scope himself (keep in mind he never did this before). He used weaver mounts and the Rifle came with the rail already installed. This is all the info I have about the rifle itself and our communication is all long distance and he has no internet access.

Now the problem:
He went to the range and at 25yds cant even get on the paper and the scope ran out of adjustment. He went home put a .025 shim under the back and tried again, the results werent much different and just barley hit the bottom of the target at 25 yds but still ran out of adjustment to move up. So my question would be; How much shim is to much shim and if its not the scope, what else could it be?

I told him to indicate the mounts to see if their the same height. I have the same scope myself and it yielded nothing but excellent results.


Thanks
CB