Martini case forming.avi

Here is a video I made showing how to form 577/450 Martini cases from 24 ga. shotshell brass. Its not hard, but even easier when you see the video. The starting case length was 2.283 inches and after forming the case length was 2.353 for those who were wondering.

Category:

Science & Technology

Tags:

• Martini
• Henry
• 577/450
• case
• forming
• reloading
• Gahendra
• Francotte
• 577x450
• 577
• 450
• .577/.450
• Martini-Henry
• IMA
• Atlanta
• Cutlery
• Nepal
• Catch
• IMA-USA
• how
• to
• do
• it
• yourself
• diy

[medhist2006]

Couldnt get a pick in to move it. Used the lead idea. put the die in a freezer for a couple of hours. Two taps with a large punch and the whole thing came out beautifully. A lifesaver. Many thanks:) Saved me sending it back to Lee

[ginsboy2003]

@medhist2006

Glad it worked for ya! Now time to start making cases!

[medhist2006]

Time for me to admit I made a mistake. THe wall of the shotshell case is much thinner than the drawn case and obvously more fragile. Having reduced the diameter to 9/16" using an opened fl sizing die I attempted to take it to the factory size using my fl sizing die. Properly lubed it ran it through and got that secondary shoulder when the die was seated fully.the neck broke off inthe die.when i tried to resize it any suggestions for removal? asalways, thanks

[ginsboy2003]

@medhist2006

The die is heat treated pretty deep, about .008 of an inch but I still would not try to use a steel pick on it. Try using a brass pick. If that fails, spray it out with brake cleaner, run a brass brush in cleaning the brass use a cuetip to apply oil to the steel, then plug the depriming hole and pour some lead into it. Hopefully the lead will stick to the brass and you can knock it out from the depriming end.

[medhist2006]

,e again:)

I made a holder like toy have out of a copper sleeve. 8 sec on the torch does it . You are correct. the light pitting was from overheating.

Its not visible in the video but did you remove the depriming rod from your die for the final sizing?

Manythanks

[ginsboy2003]

@medhist2006

For final sizing I left the depriming rod in.

[ginsboy2003]

@medhist2006

I don't think so, but you may want to re-anneal them after the 3rd reload. I'm not sure why you would have the fine pitting, maybe they got too hot?

[medhist2006]

just a thought.. wouldnt it be a good idea to anneal the cases after final sizing? I notice the nexks of my cases have developed what i would call very fine pitting. Is that a heat issue? many thanks. Now to order that rifle:)

[medhist2006]

I finally tried to reform the cases. Annealed them with a torch while they spun on a lazy susan in a pan of water

Its awkward and very slow but it does work. I only had the fl sizing die so it took 3 anneals to get them down to look like Martini cases. This morning I got my fl sizing die back from the gunsmith bored out to 9/16" It is so smooth . Cases easily make the intermediate step down. Much easier

[ginsboy2003]

@medhist2006

That is an excellent way to do it! We all work with what we have on hand!