Tired of loose pockets? I WAS but not no more!

[fguffey]

Not sure of what someone is claiming to have discovered or invented; I have new/old R-P cases from the early 40s with the same ring, Remington put the ring on the case head when crimp primers. I did not care why but I was told the 'O' ring crimp was designed to be used with machineguns.

F. Guffey

 

[fguffey]

Warning signs of pressure:

Sadly, as LHSmith pointed out, at those pressures, there is more going on than just enlarged primer pockets. I recovered the primer pockets, but the brass never shot to my satisfaction. I ended up scrapping it all.

There was a time reloaders measured case head diameter, that was before the Internet. There was a time acceptable case head expansion for a new factory over the counter case was .00025". Add then came the Internet and those claiming it was difficult to measure the diameter of the case head etc.. In the '70s Herter made a flash hole gage; it worked but the reloader had to measure the diameter of the hole before firing and again after firing. Case head expansion is a package deal: The flash hole increases in diameter, the primer pocket increases in diameter and the case head increases in diameter; and finally, the case head crushes or gets shorter from the cup above the web to the case head.

It was about this time I decided there was nothing I could do to completely stop case head separation because the case body was locked to the chamber and if the case head crushed the case would start to fracture between the case head and case body.

F. Guffey

 

[ireload2]

I read on the internet all the time about reloaders having problems all the time...

Do your Lyman, RCBS, Star and Saeco bullet sizing dies fit any of these presses?

I read on the Internet 'all the time' about reloaders having trouble sizing bullets, some have so much trouble sizing bullets they are down to .0005" a pass. For me it is a matter of choosing a press from a long line of presses.

 

[fguffey]

These RCBS tools are designed for the opposite. They "swage" or take out the crimp of military brass.

True, but a reloader with a few shop skills could modify the set-up to reduce the diameter of the case head.

F. Guffey

 

[BoydAllen]

 

[quest450]

I miss fguffey

 

[Bc'z]

I miss fguffey

Could start droppin Guff bombs, like...
What're ya doin?
Oh nothing just Guff'n off.

Oh Guff me!!
What the Guff??

 

[c3d4b2]

Do NOT attempt to anneal around the base of your brass.

+1..... Brass is made to be strong at the head to contain the pressure. Annealing will reduce the strength.

The Science of Cartridge Brass Annealing

Want to know how annealing brass works? We examine the science here.

bisonballistics.com

It is critical to understand that we are talking about annealing case necks only. The rest of the case is work hardened during manufacturing and left that way on purpose. It must be strong enough to contain the pressures of firing, and annealing any part of the case except the neck is potentially dangerous. Do not do it. Under no circumstances should you let the case body get anywhere near 700 degrees. If you do, the case is ruined, and should be crushed and discarded.

 

[ronemus]

Does anybody sell these commercially? I don't have a lathe or access to a machinist/shop so I'm willing to pay for one. It's a great idea, so I'd be very surprised if someone hasn't run with it.

 

[markm87]

My fantasy was to have a desktop mini hammer forge like they use to HF barrel.

 

[jcm800]

Great idea especially for obsolete lever cartridges.
For small primer brass do you keep the crimp shoulder the same diameter as large or scale it down?