I've had great success with them. The pic is from my Broughton-Richards barreled 270 from 2009.
I had my new Krieger barreled 270 out just this morning working on loads with the same bullet and H4831SC. Seems the deeper the bullet is seated, the better it gets. My groups sucked so far at 100 yards using 55.5gr and a 210M primer but I only had a few 3 shot group strings with varying seating depth.
By the time I was 0.020 off the lands, my last group, I finally shot just over 1/2" so I will load some more with the bullet seated deeper in 5 thou increments and see what happens.