Re: Lyman 310 and Redding competition dies?
Many of the old 310s required 310 dies if I remember right, started with one about 40 yrs ago.
If you want to load in the field just make a small wooden mount for a standard press and take it. many do that also.
I have a fold up press (Hood) that mounts to a fold up Black and Decker workmate table ($30)