Hope it does well this time.
I always prefer to cut a chamber by hand, afraid I would do too much under power.
Just chicken that way.

The older I get the less I like to do "under power", especially in woodworking. Woodworking tools - even the powered ones - are much more hand-held than in metal-working. With powered tools, one can often, (but not as often as many people think), get the job done faster. However, one can also screw something up MUCH faster AND... usually, the screw-up is catastrophic. "Unplugged", there is more time to realize "oops, I've got this wrong", AND that realization usually occurs before the piece is irreparably damaged. That's almost never the case with powered tools.

I must admit that this "new" barrel is 0.610" shorter than it was going to be because I was didn't 'flip all the levers' I was supposed to when I started cutting the threads. (The last threads I cut - for the AR-10 barrel - were 16 pitch.) I flipped the other levers and got the timing started right (two levers and a dial), but forgot to set the pitch gearing. (Two more levers.) Those 16-pitch threads were beautiful, but the 12-pitch Mauser receiver just wouldn't screw on regardless of how hard I tried.   No alternative but to cut the stub off and start over. It is true however, that had I seen the error soon enough, I could have saved the original stub.

Paul

The practise is usually to do a marking pass then check with a gauge - just to be sure!

That practice occurred to me. AFTER THE FACT!

Paul

I do recall my old man telling me, at the age of about 14, mark once,cut twice, mark twice, cut once, or some such.
Have I always done that, OH YEH, like you would believe me.

;<)

I'm blaming coffee...

Paul

Quote from: gitano;139652I'm blaming coffee...

Paul

A ex submariner blaming coffee? Brrrrhaaaaaaaaaaaaaaaa:MOGRIN:

That's my story and I'm stickin' to it!:greentongue:

Paul

I heard one that applies here.
 
 LEARNING FROM EXPERIENCE IS A HARD MISTRESS. SHE TESTS YOU FIRST THEN TEACHES THE LESSON.

Quote from: AlboyLEARNING FROM EXPERIENCE IS A HARD MISTRESS. SHE TESTS YOU FIRST THEN TEACHES THE LESSON.

Truer words have never been spoken.