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Reloading 577/450 Martini Henry

Does anyone know if I can reload this ammo? Are dies available? What specifically is needed?

I bought my 550B hoping to reload 577/450, 45-70 and 45-110.

Any help would be appreciated.

Thanks

Gary 

45-70, 45-110 no problem. 450-577 M-H is too large in diameter, the dies for this cartridge are 1"-12 TPI, not the usual 7/8"-14 TPI

I reload the Martini-Henry cases but not with a Dillon.  The cheapest way to go would be to get the large, cast iron Lee press (the one that loads the .50 BMG) and the Lee dies.  You may not be able to get the Lee dies easily since they don't have them readily available.  I bought my dies (and .577 Snider dies) in a group buy a few years back.  We had several hundred people get together and placed the orders for the dies.  If you contact Lee Precision I'm sure they will help.

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