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Originally Posted by claykuch
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A lot of experience and good information in there for sure. For my money the author puts way too much blind faith and reliance and modern machining, equipment and processes without bothering to check anything.
Take for example the first scope he installed. How does he know the base holes are in 100% dead nutz alignment with the bore? How does he know the rings are dead nutz 90 degrees to the bore? He doesn't check anything but states than modern equipment in capable of great accuracy and therefore he's confident that everything is perfect.
Is he wrong 100% of the time? Not at all, and he's probably right a vast amount of the time. Is he correct in his reliance and assumptions 100% of the time. I'm betting he isn't.
One only has to take a look at the quality of the Marlin 1985 lever action rifles put out by Remington 10 years ago when they took over manufacturing from Marlin and moved to operation to New York state.
You were seeing front sight dovetails cut 10-15 degrees from horizontal on their barrels (among many other issues). You could easily see the problems with the naked eye.
You have to know Remington had modern, if not state of the art equipment in their factory. Didn't seem to help though.
It doesn't take long to check some of these things when installing bases and rings and yes, I've had to shim a couple of bases to get vertical center line alignment in the past.
Also when people put down ring lapping they always make the exaggeration that you're taking out lots of material and ruining the rings. My experience is that isn't the case most of the time. A few light passes and you can see what the contact footprint looks like. In a lot of cases, nothing more is required.
If you need to "grind" out a great deal of material, you're best to take a step back and evaluate the installation because you've got bigger problems than what lapping will solve for you.