Reeder Custom Guns - Case forming attempt gone wrong!

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It is smiling at my attempt from .405 to 310GNR! Quick learning experience. Size to 378 then go to 310!

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.375 and getting hung up before forming the mouth & neck at .308. Try necking down a bit more, .358, before going to .308. I would also anneal the cases prior to necking smaller than .375. And don’t spare the lube.

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Went from 405 to 378 and then to 310 on the next 20. Not a problem with any.

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to get perfect sized brass. Normally I go from 378 to the 350 GNR then 338 GNR and then 310. That way I don't lose any 405 brass.

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I also had that problem So I called my Reloading Mechanic MTM. Ok he laughed a little but then told me to use the 378 sizer then a 338 win mag that he knew I had the 310 the pics tell it all [image]

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the fuggup and turn it in the 8mm Kropotchnick or the 40 Dowanger.

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Did you know the .410 shotshell (67 gauge actually) derived from the .44/40 Win. shot loadings? I think Marbles had one of the first dedicated smoothbore .44/40 guns that morphed into the .410 2-1/2" shotshell. Maybe one of those "bicycle" guns? That itself is telling as to the dating, I guess riding a bicycle was a "thing" in the 1890's? Also, for a cottage industry development for meeting a need I must assume there were lots, and lots, of feral dogs? lol

Case forming attempt gone wrong!

Curious... is that a .450 Marlin w/the belted case?

It is. I have a 1895MR. Love it!

It does look happy...

It looks like the mouth is still too wide at

I went from 405 to 310 on the one shown.

you may have to go down even more than 378

I’ll do that Gary, thanks!

310

if you were WB you would cut that case just below

Looking like it might make a dandy all brass .410 shotshell!

Or blow out 303 British for 405 short?

If you had a .405 you could blow that back out too!