Twoboxer
Member
The simple answers are:So, how is it that a progressive cannot load as accurately as a single stage?
Is it the re-sizing of the casing? Both machines are pressing a fired casing into a die to reform it....so, if I remove my Redding die from my Dillon and put it into a single stage it is now better formed or more accurate? Same die..
Maybe it is the powder measure....my powder measure on my 550 Dillon is VERY consistent...well under 1/2 a grain variation with ball powder....but then my RCBS and Hornaday deliver the same standards....maybe it is not the powder measure after all...
How about the seating die....same argument as the re-sizing die...will probably seat much more accurately if I move it to my single stage won't it? So far not yet. Same die being used...just a different press.
So where is it that a progressive is so inaccurate? Is it because with each pull of the handle it does 4 things at the same time?
Please help me understand this as I don't get this thinking.
Randy
PS. I have used ammo from my 550 in the very demanding course of fire known as Palma (800-900-1000 yards)and was able to fire Master level scores. Scores didn't go up when I loaded on my single stage
(1) watch the toolhead of a Lee Classic Turret (severe), a Dillon 650 (minor), and a quality single stage (none) paying careful attention to the toolhead and you'll begin to get the thinking - unless you believe the case/case+bullet can correct the slop angle because of some kind of die "float".
(2) Powder is often hand measured to fractions of a tenth on a single stage.
(3) Both your presses apparently produce ammo that exceeds your capabilities, so (1) & (2) may not be important to you.
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