acceptable neck turners

[JFrank]

I use the PMA with the micro adjust and craftsman rechargeable drill, I found this clamp on hobby light with magnification that really helps.

 

[Mike Montgomery]

I own K&M, 21st Century and PMA and prefer the PMA for its ease and repeatability of adjustment.

 

[RustyInBend]

Maybe it's just "me" ... but my testing shows my new Lapua (.300) and Peterson (6.5) brass mandrelled out of the box, gives me consistent concentricity of 1,000th +/- about 25%. When I neck turn (K&M) that consistently degrades to as much as 2,000th in concentricity ... but pretty much never achieves out-of-box-plus-mandrel levels of concentricity. Hence ... I've determined it's just not worth the time, expense, and aggravation. I no longer neck-turn. Obviously, some love it, some hate it. I've decided "ambivalence" to neck turning is the strategy for me. If I start seeing my concentricity suffer, I will revisit this. But so far for me, mandrelling new and fired brass, and using a quality FL bushing die (Redding Type-S with SAC bushings) is working just fine and providing low SD's and good accuracy at distances to a mile. Not trying to pick a fight ... just sharing my experiences.

 

[Straightshooter1]

Maybe it's just "me" ... but my testing shows my new Lapua (.300) and Peterson (6.5) brass mandrelled out of the box, gives me consistent concentricity of 1,000th +/- about 25%. When I neck turn (K&M) that consistently degrades to as much as 2,000th in concentricity ... but pretty much never achieves out-of-box-plus-mandrel levels of concentricity. Hence ... I've determined it's just not worth the time, expense, and aggravation. I no longer neck-turn. Obviously, some love it, some hate it. I've decided "ambivalence" to neck turning is the strategy for me. If I start seeing my concentricity suffer, I will revisit this. But so far for me, mandrelling new and fired brass, and using a quality FL bushing die (Redding Type-S with SAC bushings) is working just fine and providing low SD's and good accuracy at distances to a mile. Not trying to pick a fight ... just sharing my experiences.

Hmmm??? Did you mike the necks first to see how thickness might play into your concentricity measurements?

Also, I'm assuming it's your neck's concentricity that you're referring to???

 

[RustyInBend]

Hmmm??? Did you mike the necks first to see how thickness might play into your concentricity measurements?

Also, I'm assuming it's your neck's concentricity that you're referring to???

I don't know what "mike the necks" means ... never heard that before. And yes, neck exterior concentricity is what I'm measuring on my Sinclair concentricity gauge.

 

[Straightshooter1]

I don't know what "mike the necks" means ... never heard that before. And yes, neck exterior concentricity is what I'm measuring on my Sinclair concentricity gauge.

"mike the necks" = measure the neck thickness with a ball micrometer

Hornady Vernier Ball Micrometer 1

The Hornady Vernier Micrometer is designed to take precise measurements. Its unique design makes the Vernier Ball Micrometer ideal for accurately...

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[Hoser]

I went from a pumpkin to the 21st Century.

I dont have any tight neck chambers so all I am doing is a skim cut that cleans up 50% or so of the neck.