Neck resizing a 20mm shell

[CartridgeCalls]

Any one have any ideas how to resize a 20mm round? I have a few hundred that need to be cleaned and resized. Thanks in advance.

[hermosabeach]

The old ww1 ones

Or the modern electric primer ones?


The ww1, I believe, you can run on a Hollywood press. The Hollywood Tall Senior press should fit 20 mil

https://www.ebay.com/itm/Hollywood-Sr-Turret-Press-/284427585574?mkcid=16&mkevt=1&_trksid=p2349624.m46890.l49286&mkrid=711-127632-2357-0

Not sure about dies.

https://en.m.wikipedia.org/wiki/Lahti_L-39

20x42
20x82
20x 102- https://en.m.wikipedia.org/wiki/M61_Vulcan
20x110
20x139

[SDCarpenter]

First of all... Lower your voice...

[CartridgeCalls]

First of all... Lower your voice...

I don't get it?

[CartridgeCalls]

The old ww1 ones

Or the modern electric primer ones?


The ww1, I believe, you can run on a Hollywood press

https://en.m.wikipedia.org/wiki/Lahti_L-39

20x42
20x82
20x 102- https://en.m.wikipedia.org/wiki/M61_Vulcan
20x110
20x139

These are the modern electronic primers.

[CartridgeCalls]

I've tried to reshape using a large drill bit but they are too hard

[dizzyblonde]

I don't get it?

As I've heard it:

Man walking through an airport. He's strolling up to the checkin desk dragging a properly locked rifle case behind him. TSA agent rocks up to him and very loudly says, "Sir. Is there a gun in there?" to which dude responds, "First of all, lower your voice." because anyone hearing the word "gun" spoken by a TSA agent in an airport is liable to pee down their leg and start screaming & running and then things get unnecessarily exciting for everyone involved.

[LynnJr]

Go on one of the 20mm websites and ship your brass to someone who is already set-up to do it.

[divingin]

Is this to reload an actual, firing round, or for a curio?

If the latter, you could have a machine shop drill or machine an appropriate sized hole on a piece of steel, mallet the case mouth in as far as you want it sized, and pound it back out with a rod through the case mouth.

Would probably be cheaper to buy one (or more) though: https://www.cdvs.us/product/20mm-vulcan-dummy-round/

[CartridgeCalls]

I use all casings to make Game Calls . This bstchi recurved was the worst I had seen so far.

[divingin]

If you're making game calls out of cartridge cases, why would they need to be sized? Do you have to chamber your calls to get them to work?

[CartridgeCalls]

If you're making game calls out of cartridge cases, why would they need to be sized? Do you have to chamber your calls to get them to work?

They have to look proper when they are shipped. The necks now are very bent out of round.

[divingin]

So you don't need to size them, per se, you just need to get the necks round.

A suitable piece of tapered metal will do it. Think something like a heavy pin punch.

[pacrat]

So you don't need to size them, per se, you just need to get the necks round.

A suitable piece of tapered metal will do it. Think something like a heavy pin punch.

You mean like an ironworkers "Bull Pin"?

https://www.digikey.com/en/products/detail/klein-tools,-inc/3255/6802631?utm_adgroup=Specialized%20Tools&utm_source=google&utm_medium=cpc&utm_campaign=Shopping_Product_Tools_NEW&utm_term=&utm_content=Specialized%20Tools&gclid=Cj0KCQjw7MGJBhD-ARIsAMZ0eetgyqs3lM7DcnGXd_U0SgXOWk40FlSrGj7HvYOb_Q6YbLYebaRcNs0aAqQEEALw_wcB

[CartridgeCalls]

Thanks