To Pass Or Not to Pass

KEITH MYERS

New member
Why more than one pass when turning necks? If I take my time,go slow as not to build up any heat,and use alot of lube,My results measured with a tubing micrometer are spot on.
 
Without changing your cutter setting, a second pass will clean up the neck very nicely; thus make it even more consistent.
 
If your cutter has a little radius where it makes the cut, and you come back from the shoulder slowly, relative to the case's rotation, one pass should be fine. Give it a spin in a wad of 0000 and you are done.
 
If your cutter has a little radius where it makes the cut, and you come back from the shoulder slowly, relative to the case's rotation, one pass should be fine. Give it a spin in a wad of 0000 and you are done.

Thats how I have been doing it except for the steel wool part. I turn slow and even stop midway thru if I feel the mandrel and or case getting warm.

One time I turned a bunch of 22 Waldog cases w/o watching the temperature and they all measured different! Man being in a hurry cost me that time.

I was just curious if what I was doing was correct or if there was a new and improved way. I guess reading about how some guys are not removing all the brass in one pass kinda got my brain thinking Hmmmmmmmmmmm?
 
Imo

For me it depends on the amount needed to take off. Currently I'm only turning for my .330 neck Ronnie Long 30BR. I turn those in one pass (using a drill and a case holder).

For me, I take 1 turner, set the mandrel and cutter where they need to be, and tighten them down nice and snug, and then never touch it. If I get another gun with a different neck diameter or different neck thickness, I buy a 2nd turner. It just gives me a good feeling that I did not "change the setting" and it makes me more confident in my turning process.


MY DEFINITION OF ONE PASS: I set the turner at the desired thickness, and I turn the neck nice and slow as you described. After wipe down, and relubing the case neck again (without moving the setting on the cutter) I turn it again with a faster brass spinning speed, and a slower movement of the cutter down the neck almost to give it that polished or smoother feel. I find my necks all turn within +/- .0002 in thickness.
 
Keith ...

Why more than one pass when turning necks?

Ken Markle the former owner of K&M Services [now K&M Precision Shooting Products] told me to turn each case TWICE, AT THE SAME SETTING, to ensure that you get the desired dimension. I guess if you can get that in one pass that's OK too. ;)
 
Lots of information on this forum about neck turning. In terms of how many passes - depends on how much is taken off. I try not to take off more than .0015 (or as close as I can measure and set up my turner to that) at a time. I feel the 2nd cut gives me a much nicer cut when I don't have to take off very much. With all that being typed, if your measurements are "spot on" then don't change what you are doing.

Stanley
 
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