Originally Posted By: Tbone-AZThen i used a better scale. My Standard Deviation went down and kept it consistent.
S.D. is entirely meaningless in the context of bench rest accuracy. Which is the context you were using.
Originally Posted By: Tbone-AZIf you don't think .1 gr makes a difference, then why do a ladder test?
Why use .1 gr. in a ladder test? I sure as heck don't. But to humor you... My purpose in a ladder test, is to identify a sweet spot where varying powder charge by +/- .1 won't have any effect on group size. It's kind of like the whole point of doing it. I honestly don't know what they heck point you are trying to make?
Originally Posted By: Tbone-AZDo your 25.3 to 25.5 loads all shoot the same size groups? of course not.
I know you are just using arbitrary numbers to make a point. So I'll go along with that. But, uhh, yeah, dude, yes, they do shoot the same. That's the point being made here. The point proven by bench rest shooters around the world over and over again.
A load that will open up groups at 200 yards (bench rest is the context, remember?) with +/- a tenth is a load my whole program is designed to avoid like the plague. If your groups show a real change at point blank range with such a small powder charge difference, you might want to look into re-doing your loads. Try a different powder, most likely.
Look, I don't want to get dragged into anything here. You brought up the context of bench rest shooters being the arena where case volume sorting and weighing charges to the Nth degree is common and gives an advantage. I simply wanted to point out that you have that quite wrong. Short range bench rest shooters don't bother with that stuff.
It's a myth that seems pervasive. But, it is just that, a myth. I was just trying to help you understand that.
And, no offense, but I don't need a lesson on load tuning from you. Sounds like you end up with some finicky loads
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- DAA