Neck turning

[JFrank]

I have yet to record spring back in the manner you describe.
Take a caliper measurement on the ID of a bushing to varify it’s dimension then size a case and remeasure the neck OD to record any spring back.

 

[PracticalTactical]

Imagine having the intellectual capacity to understand that.

Tokay, When someone puts forth an idea that doesn't fit your own beliefs, you fear that you are not the know it all that you believe yourself to be and that is a threat to your over sized ego.

You never have anything to offer that is fresh or of any value.... I have yet to read a post from you that contributes in any positive way. Just consistently useless negativity and criticism. I feel sad for people like you... so afraid of change, so full of fear. Guardians of the status quo. They call that unconscious incompetence.

You can turn your brass any way you want, I really don't care. Could be some guys like the idea, even if you don't.

 

[Tokay444]

My understanding is that every cartridge brass neck that is re-sized with a bushing will spring-back slightly, which puts the neck in a state of residual tension, and vice-versa for a neck that was expanded with a mandrel. If the residual stresses are not annealed away, then removal of material can change the ID, however, the amount may not be easily quantified for a number of reasons including the possibility that the magnitude may be on the order of the surface roughness. I got into it because I had to reduce neck wall thickness in some Lapua .223 brass, as the clearance between the neck and barrel throat area was only about 0.001" or so, not a good idea per se, and I had problems chambering mag-fed 90 gr Bergers in a 6x45 AR. BTW...I built a simple neck peeler, which I believe is a bit better than neck turning, but that's a different discussion.

If your brass is in the throat area, I think you have bigger problems than needing to turn a thou off.

 

[Tokay444]

Tokay, When someone puts forth an idea that doesn't fit your own beliefs, you fear that you are not the know it all that you believe yourself to be and that is a threat to your over sized ego.

You never have anything to offer that is fresh or of any value.... I have yet to read a post from you that contributes in any positive way. Just consistently useless negativity and criticism. I feel sad for people like you... so afraid of change, so full of fear. Guardians of the status quo. They call that unconscious incompetence.

You can turn your brass any way you want, I really don't care. Could be some guys like the idea, even if you don't.

False.

 

[rwj]

I have yet to record spring back in the manner you describe.
Take a caliper measurement on the ID of a bushing to varify it’s dimension then size a case and remeasure the neck OD to record any spring back.

To obtain accurate dimensions of small diameter holes to determine spring back, I’d recommend a gauge set like in the link below…

McMaster-Carr

McMaster-Carr is the complete source for your plant with over 595,000 products. 98% of products ordered ship from stock and deliver same or next day.

www.mcmaster.com

 

[JFrank]

To obtain accurate dimensions of small diameter holes to determine spring back, I’d recommend a gauge set like in the link below…

McMaster-Carr

McMaster-Carr is the complete source for your plant with over 595,000 products. 98% of products ordered ship from stock and deliver same or next day.

www.mcmaster.com

Thx I’ll check that out, as an example I’ll size my nt brass with a .263 bushing the necks measure .263 OD even a month later measure .263 OD

 

[Ccrider]

Use the exact same process with each piece of brass. You will get the same result. After firing once or twice, you may want to do the same turning process one more time to clean up the brass. It’s really not that complicated.

Btw, don’t worry if you screw up a piece or two of brass getting your turner set. It happens.

 

[tovaert]

If your brass is in the throat area, I think you have bigger problems than needing to turn a thou off.

Sorry my bad I meant the neck area.

 

[Clark]

I am just some old engineer who is nobody in the target world... but watching Practical Tactical's video and comments here and on youtube, I am entertained. I have a mill, a lathe, etc, but I marvel at his efforts and intensity. He is a living reality TV show. We need more people like him, who try hard.