Apologies in advance for this newbie question.
I'm about to start reloading (rifle) and I've been reading as much as I can before venturing forward. I've also been watching experienced reloaders and asking lots of questions - but here's one I haven't asked before: When measuring group size to determine accuracy of the loads you're working up, how does one determine accuracy to a thousandth of an inch?
I see published group sizes listed as something like .337, .873, .566, 1.119. My calipers can measure to that precision but my errors in determining the exact center of the bullet hole in the target exceed 1/1000". Just by looking at my target, I can't truthfully determine exactly where the center of the bullet hole is to anything more than 2 decimal places at best. What's the trick to achieving accuracy measurement to three decimal places? How do the experts measure to an accuracy of 1/1000"?
Thanks in advance...
I'm about to start reloading (rifle) and I've been reading as much as I can before venturing forward. I've also been watching experienced reloaders and asking lots of questions - but here's one I haven't asked before: When measuring group size to determine accuracy of the loads you're working up, how does one determine accuracy to a thousandth of an inch?
I see published group sizes listed as something like .337, .873, .566, 1.119. My calipers can measure to that precision but my errors in determining the exact center of the bullet hole in the target exceed 1/1000". Just by looking at my target, I can't truthfully determine exactly where the center of the bullet hole is to anything more than 2 decimal places at best. What's the trick to achieving accuracy measurement to three decimal places? How do the experts measure to an accuracy of 1/1000"?
Thanks in advance...