HornadY LNL Headspace Bushing

[fguffey]

rijndael said: ↑
Interesting. I wonder why Hornady prefers .375"?

It has nothing to do with what they prefer; it has everything to do with agreeing. SAAMI uses' the datum diameter of .375", they also use .400" and .410". .375" does not work for small diameter bullets.

If there is a problem with Hornady datums it is caused by their insistence on using a radius on the edge of the datum. The radius on the Hornady tool prevents the reloader from using SAAMI measurements, the radius guarantees the measurement will not agree.

One more time, if the reloader got into the habit of measuring before and again after they could use the tool as a comparator. Or they could learn to verify the Hornady tool with a standard (head space gage). A reloader with a head space gage can verify dies with shell holders but first I suggest they learn to verify the head space gage.

For nears and years reloaders answered all of their questions by grinding the top of the shell holder and or bottom of the die. I have always thought grinding was a bad habit. A shell holder with a short deck height or a die that has been shortened from the shoulder to the base of the case is not a problem if I know how much the shell holder and or die has been ground.

F. Guffey

 

[fguffey]

Yes.

I have the case headspace changing and measuring tools, knowledge, skills, procedures, dexterity, confidence, faith and aptitude to do it precisely without verifying.

Others have all that stuff and do a better job than I do.

Precisely? And you do all of this and you do not know if the shell holder made it to the bottom of the die. You have no clue if the case is sized before lowering the ram. There are times the case has more resistance to being sized than the press can overcome. When that happens the reloader must increase the presses ability to over come the cases ability to resist sizing.

And again my cases do not have head space and all of my Wilson case gages are case gages. I have chamber gages that are different than those sold commercially, my chambered cases have case head protrusion, my chamber gages have case head protrusion. There has to be something wrong with a gage that is used with the thumb nail.

F. Guffey

 

[Bart B.]

Precisely? And you do all of this and you do not know if the shell holder made it to the bottom of the die.

I don't care If the die doesn't touch the shell holder.

Bullet position relative to the rifling when fired is not controlled by the case head to shoulder dimension on rimless cases. One or two thousandths spread in case headspace has no significant effect on accuracy.

If it did, why does Redding's competition shell holders come in .002" steps? Want smaller tolerances?

Get 2 sets then grind the tops of one set down .001" so you've got a bigger set in .001" steps. Then lock the die to bear hard against the holder and let the press ram stay there for 30 seconds while the case fully sizes down to die chamber dimensions and has virtually no springback. Use the holder that sizes cases to your wishes.

 

[fguffey]

Get 2 sets then grind the tops of one set down .001" so you've got a bigger set in .001" steps. Then lock the die to bear hard against the holder and let the press ram stay there for 30 seconds while the case fully sizes down to die chamber dimensions and has virtually no springback. Use the holder that sizes cases to your wishes.

I have the #6 set, I measured the deck height on all 6 shell holders; three of them are off by
001" each. I do better than that with a feeler gage and I am not limited to .010" longer that a minimum a length case from the shoulder to the case head. I have an Elmer Keith rifle that has a chamber that is .002" longer than a field reject length gage, that would be .016" longer from the shoulder to the case head than a minimum length case from the shoulder to the case head. That would be .011" longer than a go-gage length chamber.

For me this is not a problem; I form 280 Remington cases to 30/06 and add .014" to the length of the case from the shoulder to the case head to off set the length of the chamber.

And then there is that thing where nothing happens until the shoulder of the case collides with the shoulder of the chamber: I have told you that does not happen in my EK rifle. If I did not form cases for the chamber I could fire form. It is not a problem for me but fire formed cases are ejected with shorter necks and longer case bodies.

F. Guffey

 

[fguffey]

I don't care If the die doesn't touch the shell holder.

I know you don't, you are just going through the motions of reloading, I want to know if my shell holder and die have the ability to full length size the case to minimum length.

F. Guffey

 

[Bart B.]

I want to know if my shell holder and die have the ability to full length size the case to minimum length.

I size cases to have a couple thousandths head clearance.

 

[fguffey]

I size cases to have a couple thousandths head clearance.

And before that? It was suggested reloaders take lessons from bench resters. It was suggested the reloader full length size there cases because bench resters have been doing it for decades.

F. Guffey

 

[spife7980]

Christ. Guffey is back.