Outside neck deburring- large calibres

[SRvet]

Gentleman,
I have trimmed some .458 Lott cases and am struggling to outside neck deburr using my normal RCBS tool. The inside deburr works fine but the case mouth is so large it barely engages with the case mouth. Is there a better tool to use?

 

[MacJenkins]

RCBS makes a 60 cal manual tool. You need to be quite deliberate on 600 nitro but up to 577 no problem.

 

[coyote wacker]

I have a old Pacific that I use on my 50 B&M.