Jwv
I have my own theory about presses.
First, most of the high end presses feature very close tolerances, the ram having just enough clearance to operate.
This is good, as long as everything else is also dead in alignment.
I believe the major function of the press is simple, it provides the power to insert the case, and remove it. In reality, the die is what does all of the work.
The presses I use are so darned loose that at first glance,you would think that there was no way that really straight ammunition could be produced by them.
But there is a method to the maddness. That loose ram allows the case to enter and seat into the dies with no binding, or other influence from the press.
As I said, most shooters scoof at my three dirty little Partner Presses lined up on my loading bench, that is, untill I show them how straight the rounds are.
Last year at Seymour, we had this very discussion. I noticed that that many shooters were using some sort of loaded round straightner. I told Scott Hunter that if his dies did their job, all of that would not be neccessary.
We all started comparing loaded rounds, and mine all typically exibited less than .001 runnout. Their's three times that much. Scott said that there was no way that worrn out junk could produce those rounds. As I just said, the object is to let the dies do what they are supposed to do,with as little inflence from outside sources, including the press, as possible.
I know it tends to be "anti-Benchrest'. But the proof is in the ammunition, and of course, the aggs........jackie