Case trimmer 577/450 martini Henry

[salpal48]

I am looking for a case trimmer to handle the case . anyone on the forum knows of one. it could be a actual 577 case or 24 gage magtech brass

[abunaitoo]

Don't know if this will help, but the shell holder is the same as the 50BMG.
I'm sure something can be rigged up.
I've been hoping for a MH to come my way.
I'll need the same information if one does.

[Bad Ass Wallace]

Lee make a case trimmer for large calibres!

https://leeprecision.com/large-cutter-with-lock-stud.html

[fgd135]

My old Lyman Accutrimmer will trim the MH case, using the .45 pilot, after I have resized the neck--with both Magtech and Jamison cases. The cutter is unfortunately not large enough to trim the .577 Snider, plus, a custom pilot would also be needed.
To trim Snider cases, I use a Harbor Freight mini chop saw with a homemade case cradle for 1st trim, which requires the case to be rotated once to complete the cut, then I finish with a file.