Re: Die recommendations
Your question is understandable but impossible to answer; there is no certain and clear-cut difference at all.
Where the Forster/Redding seaters have an edge over others is design, not tolerances. Actually, if you have a conventional seater that has tolerances stacked toward perfection it can do as well as any. But most don't, so the F&R seaters full length body and bullet sleeves hold everything in alignment somewhat better before seating begins and that usually does a better job for concentricity than those without a full sleeve. Short sliding sleeve seaters (Hornady/RCBS) can make them a little easier to load with but I've never seen any evidence they load better than others.
Comparing how much difference the full body/bullet alignment sleeves make involves not only the tolerances of both types of dies but the quality of the case necks AND the skill of the reloader. Loading high grade ammo can't be bought in a tool box of any color or cost, it must be assembled by a high quality reloader and that only comes with time and study! Bottom line, all we can say for sure is the F & R seaters do as well as can be done with threaded dies. Other so-called 'competiton' dies aren't in the same league, in fact they don't seem to do any better work on average than conventional seater dies.
Micrometer heads do nothing for the quality of the ammo, they are only a user convienence.
Last edited by boomtube; 11-19-2010 at 08:12 PM.