Dang....I'm gonna be out of luck with a taper die, Dillon's SDB does not have a die like that available.

My range-mates use Dillon 550's, maybe that's the difference?

I do have a decent roll crimp on my loads as is and fully re-size.

The chamber looks like a mirror inside, as does the feed ramp.

I will try trimming all to a common length and see if that repairs any issues. Any suggestion on the trim length?