Triming Cases

[Nuclearcricket]

This goes out to all you 44-77 shooters. Do you trim your new brass before you fire form it?
If you do trim your brass, what trimmer do you use?
What length should it be trimmed to?
Now all of that being asked, I do have 2 forester case trimmers, one has been opened up for 45-70 and it wouldn't take much to open it up a little more for the 44 case and I think they offer a collet for that size case head.
I don't know if it would be cheaper to have Lee make me up a trimmer or not.
Thanks for your help
Sam