I have almost every brand of trimmer available, mounted on blocks/stands for the most part, but I use a Lee trimmer if I cand find one to fit...just so quick and easy and ACCURATE compared to some of the other ones - zzzzzzzzz and it's done...and Wilson's...I have 3 different length "noses" to fit the micrometer end so I can switch from one size case to another quickly...
I use a Lyman for very long cases I can' fit in the Wilson or there is no Lee to fit, it is also a "dead" length trimmer and is as accurate as the Lee and Wilson, but I bought the Wilson beaucoup many years ago...I think there is a longer base available today for the long cases. The RCBS just sits in the corner looking forlorn.
Every trmmer that uses collets and a screw type clamping system is prone to variations in trim length caused by variations in the rim OD, unless you are very careful in where you stop and the amount of clamping pressure...I learned this the hard way.
A couple thou doesn't make all that much different in hunting ammo [beeep]'...only for us anal retentive inveterate "perfectionists".
But the Lee comes closest to being the "Perfect" trimmer unless you use a "dead" length stop like the Wilson, the Lyman and the Hornady Camlock (looks like, I've never actually tryed one)...the other "Perfect" trimmers.
For your application, JE, I would stick with the Lee if I has worked for all this time...I have a Lee case gauge for almost all my cartridges from 223 to 50 cal stuck in the reloading die box, half a dozen cutters, most of the shell holders...unless you just like new toys like I do.
I've even made "collars" to fit over the rod and nipped of and rounded the end pin, then epoxied or solder sweated the collar in place...to fit a few wildcats...I would like to make one for my 50 cal Rigby but no shell holder is available...maybe I can adapt the 3 jaw chuck from the Zip trimmer and make a case gauge for the large trimmer body....maybe someday, right now the LYMAN 3 jaw chuck works just fine.
Hahahahahah
Luck