Decapping punch

A universal decapping die could be made to work by hand, but for 20 cases it wouldn't be worth buying. Someone close to you might have one. For doing 20, you may be able to get away with a nail and small hammer, but it's gonna need to fit through the flash hole.
 
^ I have those that came in various LEE LOADER kits back in the day. Is a couple of de-capper bases that I made on my lathe to hold belted case heads. I drilled a hole into my work bench to hold those decapper bases in place - then drilled like a 3/8" hole all the way through - set a garbage pail under neath - is mostly how I do all my de-capping these days. The Universal de-capping dies have sat on the shelf, pretty much unused, since I got the base for the belted cases made.

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My reloading bench is 3/4" plywood deck with 2x6 on the flat near front edge - hole for de-capper holder less than 1/4" deep - just to hold it there. 3/8" hole to allow de-capped primer to fall through is all the way through plywood and 2x6 - falls into garbage pail below.

I think the shorter, fatter punch came in a 30-06 Lee Loader kit. The longer skinnier punch came in a Target Lee Loader kit for 22-250. I am not sure sure that the punches could not be turned from normal rod? Diameter of the rods appear to want to be snug to the inside of case neck, but you still have to "feel" that the punch end went into the flash hole - so I do not think diameter is so critical - the .22 punch decaps .338 Win Mag just fine.
 
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^ Yes - the punch just has to fit through the case neck and then you "feel" that you went into the primer hole with the end of it - then hold more or less centred and tap it with hammer - the fired primer comes out. If you are reloading a .17 or a .20 or similar, you would need smaller diameter than .224" diameter, I would think. Not an issue if case mouth larger than punch diameter at mouth - just hold it sort of centred when you tap it.
 
I use a decapping punch quite often for many of my cartridges mostly for my
577 Snider ( made from 24 gauge MagTech brass)
8.15X46R ( made from 30/30 cases)
12 gauge brass cases
45/70
Some I just hold in my hand and others I use the Lee decapping base.
Cat
 

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You could look for a small decapping pin like lee or franford.

https://www.amazon.ca/Lee-Precision...94&sprefix=hand+depriming+tool,aps,138&sr=8-9

I did get something similar for the frankford arsenal hand depriming tool. Needed to get the smaller replacement pin for SR primer pockets. They have replacement pins as well, just can't seem to find any.

Possibly a small pin punch would work, but again you gotta have small ones.
 
Made one from a Princess Auto dental pick, cut in half =2
and just held the brass in a shell holder on the press ram raised to the top
maybe not top shelf but it worked
 
I was in the Vernon Canadian Tire on Monday and saw a very unique "DECAPPING TOOL"

There was only one and it was encased in one of those hard, clear polymer packages all melt welded around the edge and locked behind glass doors.

It claims to be able to "DEPRIME ALL TYPES OF PRIMERS FROM ANY CASE"

I didn't see a price on it, but if I were younger, I would have bought it.
 
Find a retailer that sells RCBS products and buy a “replacement” decapping pin for their dies. They go for about $10. Choose one that’ll fit your smallest calibre shell and it’ll work on the bigger shells as well. Thimpo!
 
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This works for me. If I remember correctly its a concrete nail with the tip ground to fit through the flash hole. You have to feel around a bit till you feel the tip slip into the flash hole and then a tap with a hammer. I feel I must add, please make sure it is a spent primer!
 
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