Originally Posted by
Rascally
The collection of "random parts taken from a bin" seldom leads to really accurate results, however. Isn't that why a really good 1911 will be full of hand-fitted parts? Sometimes costing as much as or more than the original gun? "Acceptable accuracy and function" mean different things to different people.
And while if may be true that "big gains in accuracy don't often come from one simple operation", those big gains can come from a series of small operations, all working to the same end. Any hand loader can tell you how large a difference can be had from a small
.2 grain change in loading, or a small change in bullet depth, or changing primers or brass. It can and does make the difference between .5 MOA and 1.5 MOA.
In light of these things, why would you not do something so easy and simple that can nudge you toward your goal?
I recently completed an upper built with a BCM receiver. They certainly nailed the tighter fit for the barrel extension. But the front of the receiver was not perpendicular to the bore. It is now...