I use Hornady dies (inc. 9.3x57 & 9.3x62) in a variety of calibres now, along with Lee dies. I prefer the Hornady dies to all. they are also exceptional for necking up cases due to the longer, extremely hard & smooth tapered expander in the neck and FL sizing dies.

I do have some old RCBS dies, but as normal, they oversize cases.

I guess mine were made with reamers that should have been thrown in the garbage, but that is not like RCBS, who continues to turn out undersized dies, that oversize cases and reduce case life along with promoting stuck cases.

I use brand new 8x57 R-P brass for forming my bro's 9.3x57 cases.