Thank you for the kind words.
Sorry, bud, not a machinist nor a gunsmith, just hobbyist enjoying the journey of learning. I never operated any machines till 2015, I was 4 years into my retirement from the semiconductor industry.
Prior to 2015, I ordered a barrel that took over a year to get, I decided then that I will learn how to chamber, fit my own barrels. Fortunately, I know some people mentored me in running the machines, and others in chambering.
I was like sponge reading about lathes, mills, speed, feed, depth of cuts, etc. I talked to people picking every bit of kernels of knowledge. At the end of the I formulated the basic guidelines I will proceed in the quest. As we preached and practiced in my previous life --- Continuous Improvement
To accelerate the learning curve I volunteered to do the TX JRs rifle team barrels. My community service to the future of our gun rights...
There are various practices in just chambering, and setting headspace. I believe not a single one stands above the rest. The best procedure is the one you are comfortable with and getting the desired outcome. It boils down to Machining 101, cutting a workpiece to the intended dimension.
I am currently rebarreling one of my CMP bare Garand receivers. I ordered a set barrel prints to turn a 1.25 inch straight blank into a Garand barrel.
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Earlier on I bought similar prints for the M14 when re-barreled my suppressed M1A hunting rifle.
One thing with this hobby, I bought all the machines, and tooling not just for me. I share my limited knowledge and resources with friends. They want their barrels, they better come and do it on my over-the-shoulder. I checked them out prior on safety and machine operations.