Just went to try a Parker Hale BA20 on my Savage No4 which appeared to have been drilled for this type of mount. Firstly, the two holes are not in alignment, second the threads differ from those of the supplied screws and third and more worrying, the holes seem to have been drilled right through the receiver and into the top of the barrel threads.
Can anyone advise on how deep these holes should be and why they might have been drilled askew or does this just sound like a DIY gunsmithing job.

Please note that I'm a novice so perhaps all is OK and I am expecting too much more precision.
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