Finally a Topic right up my alley.
It looks like everyone has covered pretty well,
But the brass from Quality Cartride is too expensive. I bought one box just to have some properly marked brass, but other than a novelty it's not worth it.
The common trim length's are 1.15 and 1.16 depending on the data.
I personally think it's worth it to bring it to about 900-1000 fps, I've experienced problems with accuracy downloading the .41 mag too far, but maybe that's just me.
Also the 'special' loading makes a very accurate and pleasent round, for me especially. I shoot about 200-300 rounds a week through my Taurus M415.
If anyone is really interested I have quite a bit of .41 Special data, and some loads that have worked out for me very well.
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An old west lawman once said when asked why he carried a .45, "because they don't make a .46"