I use all kinds of trimmers.  Hard die style from C-H work good, quick lick with a file they are trimmed.   

Looking at the old RCBS style hand crank trimmer they could probably be modified to trip larger cases with a custom pilot and cutter.  Lee makes a lot of custom dies perhaps they could make one of there chuck mounted hand held trimmers for the big 50's  I use the Lees when I have a odd case that's going to get little trimming. Mount the case in the lathe.

Only thing is long straight single shot cases don't get trimmed much. It's been years since I trimmed my 38/55 fixed cases.  Just recently trimmed up 100 new 45/70's and thats all they will probably ever get. I think I would go with C-H do it once then never again.

Boats

Send Wilson an e-mail. 

A few months ago, I inquired 'bout a trimmer for a .50-70 Gov't. They replied that all they needed were 3 cases --fired, FL sized, or new. I believe  the cost was US $30.00 or 35.00. Will need to find the e-mail again for exact price.