How fussy do you guys get when neck turning?

[Dutchie]

I know when you neckturn it's ideal to get the neck perfect but I'm just curious how fussy you guys get when you do it....I mean how many tenths of a thou is acceptable? 1,2,3 tenths?

 

[Dusty Stevens]

If theyre not exact you wont have consistent neck tension. If theyre not the same you need a new neck turner or another method for cooling it between cases for a more consistant cut

 

[ARIZONA_F_CLASS]

I separate the brass by .00025 from .013, .01275, .01250 One thing I started to do is I put the cutter in the freezer before cutting to keep the cutter cooler longer. You will get different cuts from the cutter being cold to when it heats up.

 

[Alex Wheeler]

You should be able to keep them all within a tenth if you keep the tool cool. Lay it on an ice pack or in a dish with ice water between cuts.

 

[CatShooter]

Last month I cut 1,050 pieces of 6mmBR Lapua cases to 0.0083" Every one I measured (1 every 25 pieces) measured 0.0083" +/- less than < 0.00005" as measured on a Starrett tube mic - and I worked fast - no ice on tools (except outside )

 

[Patch700]

Last month I cut 1,050 pieces of 6mmBR Lapua cases to 0.0083" Every one I measured (1 every 25 pieces) measured 0.0083" +/- less than < 0.00005" as measured on a Starrett tube mic - and I worked fast - no ice on tools (except outside )

The measuring of something like that to the 5th decimal is quite a feat to be performed by anyone who is not used to using instruments such as a tubing micrometer.. Kudos.

My first time playing with a tubing ball Mic was an eye opener lol.

 

[Shynloco]

If theyre not exact you wont have consistent neck tension....

AND that will effect your concentricty/runout that can effect your accuracy downrange. SO your cuts have to be clean and even all 360 degrees. Don't skimp on your turning tool or blades either.

Alex

 

[Joe Salt]

I guess with my big hands, I'm not that good with the starrett's I own. But from what I come up with is if I'm half a thousandth off with my readings I'm GOOD! And I would like to measure some of the brass people say is within 0.0083 its probably same as mine.

Joe salt

 

[ShootDots]

I guess with my big hands, I'm not that good with the starrett's I own. But from what I come up with is if I'm half a thousandth off with my readings I'm GOOD! And I would like to measure some of the brass people say is within 0.0083 its probably same as mine.

Joe salt

You are right about where I am Joe! I too, "am good to go"!!

 

[amlevin]

If you aren't going to be fussy, why turn the necks at all? Just have your rifle chambered with a no neck turn reamer and don't bother with a process that's by it's very nature "fussy".

 

[CatShooter]

Last month I cut 1,050 pieces of 6mmBR Lapua cases to 0.0083" Every one I measured (1 every 25 pieces) measured 0.0083" +/- less than < 0.00005" as measured on a Starrett tube mic - and I worked fast - no ice on tools (except outside )

The measuring of something like that to the 5th decimal is quite a feat to be performed by anyone who is not used to using instruments such as a tubing micrometer.. Kudos.

My first time playing with a tubing ball Mic was an eye opener lol.

I worked my way through high school as a machinist, rebuilding Singer industrial sewing machines and then spent 9 years as a gunsmith...

... this is not my first rodeo.

 

[JBO]

Last month I cut 1,050 pieces of 6mmBR Lapua cases to 0.0083" Every one I measured (1 every 25 pieces) measured 0.0083" +/- less than < 0.00005" as measured on a Starrett tube mic - and I worked fast - no ice on tools (except outside )

The measuring of something like that to the 5th decimal is quite a feat to be performed by anyone who is not used to using instruments such as a tubing micrometer.. Kudos.

My first time playing with a tubing ball Mic was an eye opener lol.

I worked my way through high school as a machinist, rebuilding Singer industrial sewing machines and then spent 9 years as a gunsmith...

... this is not my first rodeo.

Okay buckaroo ;D not trying to steal the tread just a quick "?" With a 284 F Class rifle what should my loaded round measure?

 

[CatShooter]

Last month I cut 1,050 pieces of 6mmBR Lapua cases to 0.0083" Every one I measured (1 every 25 pieces) measured 0.0083" +/- less than < 0.00005" as measured on a Starrett tube mic - and I worked fast - no ice on tools (except outside )

The measuring of something like that to the 5th decimal is quite a feat to be performed by anyone who is not used to using instruments such as a tubing micrometer.. Kudos.

My first time playing with a tubing ball Mic was an eye opener lol.

I worked my way through high school as a machinist, rebuilding Singer industrial sewing machines and then spent 9 years as a gunsmith...

... this is not my first rodeo.

Okay buckaroo ;D not trying to steal the tread just a quick "?" With a 284 F Class rifle what should my loaded round measure?

I don't shoot a 284, and the OAL is determined by the individual rifle and throat.

 

[dedogs]

JBO, Are you talking OAL or loaded round diameter?

 

[JBO]

JBO, Are you talking OAL or loaded round diameter?

Loaded round neck diameter.

 

[artbosco]

I know when you neckturn it's ideal to get the neck perfect but I'm just curious how fussy you guys get when you do it....I mean how many tenths of a thou is acceptable? 1,2,3 tenths?

3 to 4/10,000ths. You'll here some tell you .0001" or better, but I've never been convinced. Do you know how small 1/10,000ths is? ???

 

[Keith Glasscock]

Off-Topic.

284's like some neck clearance. .004" total works well for me.

 

[Joe Salt]

Outdoorsman Exactly half a thou. Is all you need! Been up against the best shooters in the Country and never heard one say if I had me necks closer to tenths than half thou. I would have won.

Joe Salt

 

[Dutchie]

I know when you neckturn it's ideal to get the neck perfect but I'm just curious how fussy you guys get when you do it....I mean how many tenths of a thou is acceptable? 1,2,3 tenths?

3 to 4/10,000ths. You'll here some tell you .0001" or better, but I've never been convinced. Do you know how small 1/10,000ths is? ???

Well I'm basically getting 2 to 3 tenths of a thou with my 21st century neck turner. Some have suggested to take a rough cut first and then a finished cut to get a better result. I know I have already improved the neck by 85%. Just didn't know if 1 tenth of a thou or better was capable with this tool.

 

[amlevin]

I love threads like this. Claims of near perfect neck thicknesses after turning.

Out of curiosity, how many ream or hone the case neck ID to make sure that THAT surface is near perfect before turning the necks. If not any variation there remains even if the OD was turned.