I load precision 260 ammo on my. Precision may not be the term for what I shoot, but you get the picture.

I have shot some fairly small repeatable groups at distance with ammo loaded on my dillon. My pal (who I load for) has shot some insanely small groups at distance, repeatable also.

I dont use it as a progressive when loading precision stuff, I use it as a single stage. Ex: I lube and Size, then remove from press and tumble to remove the lube. Then I charge in my loading block, then back to the dillon for bullet seating.

I am pretty happy with this set up.

Sean