Re: Cost of barrel threading
I wasn’t going to chime in but, Mike nailed it, dead center. I've performed this test in the past with the same results.
I've chambered rifles by first warming up the machine for 15 minutes and then by just running it enough to clean up the breech end of the barrel. Guess what, they all shoot at or better than my published accuracy guarantee. I'm now using a machine that has a published net weight of 1,700 #'s, this up from a machine that had a published gross shipping weight of 1,374 #'s
The lighter weight machine still built great rifles. Simply put, it doesn’t take much machine to build a tack driving rifle. Those that will have you believe differently are masters of self promotion and have mastered the art of deception by smoke and mirrors.
It's all fluff and BS.
For the record, I think 300sniper has a pretty good grasp on the topic of extremely accurate rifles and how to build them. Try listening to him more in the future, it will pay off in the long run.
Keith, at least your thinking and trying to get a tighter grasp on the concept. My hats off to you for that. Contrary to what you may or may not believe, barrels are dialed in anywhere from .0000" to .0002" everyday in this industry, that’s very common. Unfortunately, there are those that still machine and chamber between centers, indicate off the exterior of the blank, use die nuts for muzzle threads, taps for receiver threads and have the mind set of “that’s good enough for me” Those are the guys not to listen to.
Know this though, if your holding your work by a spider and or small brass / copper tips and start taking large roughing cuts, your work is apt to move costing you your setup. I take .020" to .030" max cuts during turning operations and a lot less when I get close to where I want to be. Threading starts off at .010" and ends up with just tool pressure (spring pass) on the last two or three pass's.
I'm always looking for that better mouse trap and is why I've changed my entire machining system from machine to tooling and a large part of my rifle finishing procedures, all of it. I’ve never been more pleased with the quality of my machining and or completed builds, ever. Actions and shared procedures of other builders here on Snipers Hide like Mike Bush have caused / forced me to step up my game, I urge you to do the same. If you never strive for perfection, you'll never achieve it.
As a parting token concerning the topic of spiders, small holding / clamping points, small cuts and their merits, here’s two names of builders that use such procedures;
Surgeon Rifles
Gradous Rifles
If it’s good enough for them..........it’s good enough for me