Just purchased a RCBS Case Master. Perhaps a little fiddly to set up but I am sure that will change with practise.

So far on a random selection of my reloads with used cases 222/25/06/7x57/308

Case neck run out, all very good mostly under 0.002"

Case Neck thickness, again very good mostly under 0.002"

Case head separation, excellent

Bullet run out, appalling often up to 0.01"

I use Hornady New Dimension/RCBS/LEE die so either I am ham fisted with bullet seating or my press a Wamadet is way out of alignment.

I will be undertaking more test next time I reload, what is your experience of this tool?

Make sure the dies is properly secured onto the press. Make sure there is no dirt in the inside lining of the shell holder - this could also be the cause of misallignment.

How do they shoot?

Surprisingly well, they will all do under an inch on a good day, but I wonder if the bad days might be partly due to poor alignment.

Take five rounds with the least amount of run out and then take five of the worse ones and shoot all ten at what ever range youll be shotin at and note the point of impact.
you will be suprised.

To ensure concentricity I start the bullet in the case neck with the seating die then retract the case, turn it 180 degrees, and finish seating the bullet.
This method keeps runout to <.003", but I've shot rounds with up to .007" and couldn't see a difference in groups.

"I will be undertaking more test next time I reload,"

Okay. ??



"what is your experience of this tool?"

None