One more lesson learned

[Multiracer]

Is there any way to make this POS more concentric ? It seems to have too many moving parts on the shell clamping end.
The adjustment and micrometer work fine on the cutter end. Cases are coming out OK but I hate seeing that much runout.

 

[Straightshooter1]

Is there any way to make this POS more concentric ? It seems to have too many moving parts on the shell clamping end.
The adjustment and micrometer work fine on the cutter end. Cases are coming out OK but I hate seeing that much runout.View attachment 1619206View attachment 1619207

When you say "that much run out" am not sure what you're referring to???

Are you talking about any wobble you see as the necks are being cut?

 

[DShortt]

It appears to me that that arrangement is very similar to their concentricity gauge.

Not a fan.

 

[Multiracer]

When you say "that much run out" am not sure what you're referring to???

Are you talking about any wobble you see as the necks are being cut?

Yes, even though the neck is on the mandrel while cutting.

 

[JMayo]

Supposed to wobble. I use a drill and a pma. Sometimes it wiggles my hand allot. But to put it on a contricity (sp) gauge it's fine. The die will fix it when i size anyway.

 

[Straightshooter1]

Yes, even though the neck is on the mandrel while cutting.

It's ok. . . it's designed to do that and works to get best results doing that. That's the way it is the a hand held cutting assembly when turning the necks. The wobble allow the neck to stay firmly square on the mandrel without distorting the neck.

 

[MikeRu]

I use K&M and it’s designed to “float”. It measures fine despite the runout but there’s a way to insert the case into the holder to limit runout, just play with it. Maybe try applying steady thumb pressure into the shell holder while tightening up.

 

[Multiracer]

I use K&M and it’s designed to “float”. It measures fine despite the runout but there’s a way to insert the case into the holder to limit runout, just play with it. Maybe try applying steady thumb pressure into the shell holder while tightening up.

I get about one out of ten that feels concentric as it enters the mandrel.
Thanks for the lessons guys.

 

[SeabeeKen]

Are neck thicknesses consistent? Thats all it is intended to do. Runout is another issue. My K&M cuts perfectly and is consistent even with some wobble. I see the tool is only clamped to the bench on one end, could that contribute to the wobble?

 

[CaptainMal]

I use the same Hornady tool. Before using I put the capers through a sizing die to be sure they and the necks are as "straight" as is reasonable.

Then turn them on a tight mandrel.

 

[RustyInBend]

The best way to improve your situation ... is to scrap it and buy a Henderson.

 

[ArtinNC]

The die will help that and fire forming should take all that out .

 

[Multiracer]

I use the same Hornady tool. Before using I put the capers through a sizing die to be sure they and the necks are as "straight" as is reasonable.

Then turn them on a tight mandrel.

Did that.

 

[Multiracer]

Are neck thicknesses consistent? Thats all it is intended to do. Runout is another issue. My K&M cuts perfectly and is consistent even with some wobble. I see the tool is only clamped to the bench on one end, could that contribute to the wobble?

Yes, surprisingly good and consistent. About a .001" taper toward the shoulder.

 

[Multiracer]

The die will help that and fire forming should take all that out .

These are once fired in the same chamber.

 

[3Ackleys]

The best way to improve your situation ... is to scrap it and buy a Henderson.

Did Henderson add a neck turning kit to their trimmer? I looked on their website, but can't find it.

 

[ArtinNC]

These are once fired in the same chamber.

I don't understand . Why are you turning brass after firing ?

 

[Multiracer]

I don't understand . Why are you turning brass after firing ?

To make the necks round ?

 

[DShortt]

To make the necks round ?

Shouldn't you do that before the first firing if that's your goal?
Unless you're fireforming brass from a reformed parent case?

 

[Multiracer]

Shouldn't you do that before the first firing if that's your goal?
Unless you're fireforming brass from a reformed parent case?

I took some Mexican Aguila brass and have been learning about case prep, Nothing fancy just learning the setups and the tool.