Hi Mr. Angry,
Let me suggest starting this out as a hobby first, get your tools and pay for your learning curve, find a little niche in the market that you’re good at and go from there. I think you will find when you branch out to things you’re not familiar with, things other than you specialize in, it turns out to be a NO money maker, but that’s your learning curve and that’s how you get experience.
To answer your question: yes, a person with good mechanical ability can figure this stuff out on his own. Just remember that guns are made on a machine and they are mechanical, study it long enough and you’re figure it out. When you get your milling machine remember any shape cutter you can grind or buy and put in the spindle you can cut.
I’m a prime example of a smith that has had very little formal training. This is one reason why I don’t refer to myself as a Pistolsmith, because I don’t think fair to those that had formal training. I do various types of machine work here and don’t follow most of the tradition method of smithing, so calling me a metal smith is about the safest.
I bought a Kuhnhausen shop manual when first started out and soon found out it was not much good to me, but that’s just me, I’m sure there are more good books & videos out there that will help you along the way. Jack Weigand just came out with a video on barrel fitting. There are a few smith offering courses which can cat-a-polt you into pistolsmithing. At times I wish I had formal training because I did my share of struggling. I personal know Jack and his machining ablity, I would go for his course first.
Hope this helps out, Pete Single
Mr.Angry, while I was typing this post I see you got a bunch of replys, told ya there's a bunch of good guys here to help you!
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Metal Smith
The only thing I know for sure is what I can measure!
NRA Life Member