Custom neck turners

[P1ZombieKiller]

If the K&M cutter get dull, I would suggest getting a PMA model A. I have 2 cutters that more than 7,000 cuts on it. and 1 that has more than 15,000 cases done..... Still sharp as ever, and makes perfect cuts.

 

[liljoe]

I have that same die.
Joe

 

[Fotheringill]

liljoe-

No you don't. The other poster obviously (in my own personal experience) used a bushing sizing die with a bullet ready to be seated instead of a seating die and used a lot more pressure on the ram than usual.

I have NO idea what YOU did.

 

[Shinbone]

The OP is clearly stating that he is cold forming the necks to his desired thickness. He also mentions that doing so may require a subsequent trimming for length, which would be consistent with the cold forming method he describes since it would build up the brass in a new spot. Malleable metals are cold formed using spinning methods all the time, so it would not be surprising that this may work on necks.

The OP's terminology may not be the most precise, but people shouldn't make fun of him for trying out and reporting a potentially new neck-sizing method. At least atttempt the OP's methodology for yourself before saying it can't work.

JMHO

 

[47WillysGuy]

Smushing taking the place of precision. Could be a donut making tool. IMHO!

 

[BoydAllen]

If the K&M cutter get dull, I would suggest getting a PMA model A. I have 2 cutters that more than 7,000 cuts on it. and 1 that has more than 15,000 cases done..... Still sharp as ever, and makes perfect cuts.

Yes the PMA is excellent. Its cutters are carbide. To be fair to K&M it has that option (at an additional cost), and my cutters are not carbide. The situation that I posted about took place many years ago.

 

[rwj]

Smushing taking the place of precision. Could be a donut making tool. IMHO!

What tolerance level is considered to be precise? There is one cold forming process (pilgering) that can produce less than .001” variation in OD in a 15 foot long piece of seamless tubing...

 

[47WillysGuy]

What tolerance level is considered to be precise? There is one cold forming process (pilgering) that can produce less than .001” variation in OD in a 15 foot long piece of seamless tubing...

The OP wrote and my concern would be that, “The K&M turner does not cut the necks, it moves the brass into the shoulder or extends the length of the necks.”

I use a PMA neck turner and it is adjusted to cut slightly into the shoulder. Thickening (donut) the shoulder for me would be counter productive esp if I’d have to cut the necks again. If it works for him, great.

 

[BenPerfected]

The concern of a donut disappears when you follow up with the perfect sized expander mandrel.
Ben

 

[1bamashooter]

The OP is clearly stating that he is cold forming the necks to his desired thickness. He also mentions that doing so may require a subsequent trimming for length, which would be consistent with the cold forming method he describes since it would build up the brass in a new spot. Malleable metals are cold formed using spinning methods all the time, so it would not be surprising that this may work on necks.

The OP's terminology may not be the most precise, but people shouldn't make fun of him for trying out and reporting a potentially new neck-sizing method. At least atttempt the OP's methodology for yourself before saying it can't work.

JMHO

That's good and all but K&M doesn't make a tool that is designed to do that

 

[Willie]

I've been around long enough to know that there are things beyond my pay grade, but I'm still very skeptical that Ben's "new" method is an improvement on conventional neck turning.

I am open to the possibility of cold rolling, if Ben would detail the steps he went thru to get his results. I would be interested in how he set up his K&M Turner to "smoosh" the necks, how long it took to get to his target thickness and how much longer his neck length increased.

I suppose that shooting and resizing, a number of times, would determine if he is really on to something versus the more well known method. This thread has been on my mind as I am turning 200 pieces of Lapua 6.5-284 brass for a .296 chamber neck and going old school.

 

[BenPerfected]

Just ordered another 100 ea of 6 Dasher hydro-formed brass that has been purchased with .012 necks. When it arrives, will use my iPhone video process that will show consistently reducing necks to the exact target. In my case, thinning the neck to .010 +/- .0005.
Ben

 

[dcali]

Preface: this is me thinking out loud, and possibly not coherent or sane.

Regardless of the design of the K&M tool (which I do not own, but am fairly certain is meant to cut metal), perhaps there is something to this technique. Perhaps a tool could be designed to do this on purpose. Maybe a solution to a problem that doesn’t exist, but hear me out.

Hard necks don’t yield when you seat a bullet with light neck tension. But it takes a few firings to get there. If we were to cold work the neck prior to firing, you’d think it would get us there sooner. The annealing crowd will be unimpressed with this logic. But... maybe it would work if you can indeed achieve appropriate tolerances without cutting metal.

I might be full of it, but sometimes crazy stuff can be developed into stuff that isn’t so crazy.

 

[butchlambert]

Just ordered another 100 ea of 6 Dasher hydro-formed brass that has been purchased with .012 necks. When it arrives, will use my iPhone video process that will show consistently reducing necks to the exact target. In my case, thinning the neck to .010 +/- .0005.
Ben

Ben, I've been all over K&M's website and can't find the tool that you are speaking of.

 

[BenPerfected]

Ben, I've been all over K&M's website and can't find the tool that you are speaking of.

Butch, PM me my your email address & I will send the info on the K&M tool & my email address.
Ben

 

[butchlambert]

On the way.

 

[BenPerfected]

Ben, I've been all over K&M's website and can't find the tool that you are speaking of.

The neck turner that K&M sells is the same one I own. All I did was turn the K&M cutter around....this all started as an accident. For me, the K&M neck cutter as designed turned out to be less consistent than my accidental set up of the K&M neck “smusher”. Buy the excellent K&M neck turner, then decide what way you think is the best to orient the K&M neck cutter blade.
Hopefully, this is clearer than my previous deleted post,
Ben

 

[geo.ulrich]

Just ordered another 100 ea of 6 Dasher hydro-formed brass that has been purchased with .012 necks. When it arrives, will use my iPhone video process that will show consistently reducing necks to the exact target. In my case, thinning the neck to .010 +/- .0005.
Ben

I'm confused, so you are using a neck turner that is made to turn necks to .0001's and using it to hold + - .0005's

 

[BenPerfected]

I'm confused, so you are using a neck turner that is made to turn necks to .0001's and using it to hold + - .0005's

I am also confused, too many .0000000000

 

[47WillysGuy]

The concern of a donut disappears when you follow up with the perfect sized expander mandrel.
Ben

In which the donut maybe pushed outward which may change your headspace. Which may cause hard bolt lift caused by excessive pressure. Plz keep updates coming on rolled necks.