Case run out & marking

G

gunsmoke77802

Guest
So I use the Neco case run out gage to sort cases by wall thickness variation. How do you guys mark the case? I saw the tool Square Peg Precision used to make but heard he was retired. What variance do you sort cases to & when is it enough of a variance to affect how you load them in the rifle?
0.0" - 0.2" enough to call good? No need to orient when loading?

thanks

JayB
 
A sharpie for a temporary mark and a three corner file to notch the rim permanently. Unless you have really bad crooked rare brass (that you have to use) I think its a waste of time. You'd be miles ahead to sort out the good stuff and discard the bad.
 
That's what I am trying to figure out. What is good stuff & what is bad stuff?
 
What kind of brass, what cartridge?

Taking some portion of the total that is the most uniform is the obvious answer.

If you are shooting PPC or BR just buy Lapua and shoot it seems to be the default solution.

If you're shooting a wildcat based on .303 British then you have a different problem!
 
Sort your brass by weight..+or- .2 grain for benchrest..and shoot...wall thickness variation to some degree exsist on all brass..and doesn't affect powder ignition property, but if you are shooting unturned case necks in a factory chamber all is a mute point...you have lots of space in that chamber anyway...:eek:
 
If you're shooting short range BR or live varmints out to 300 yards, buy good brass (Lapua or Norma), run it through a neck die to round up the necks (turn the necks for a tight neck chamber too :D), uniform the primer pockets and flash holes. Then shoot it. For competition use if you get a flyer that's unexplained by wind or you obviously blew the shot :eek: set that case aside. If the cases that produce fliers do the same thing the next time they're loaded, pitch 'em.

Weighing cases and all the other stuff won't show if the cases will shoot good groups or shotgun patterns. BTW, brass has about 8 or 9 times the density of most powders, so if all of a grain of case weight is taken up by reduced or increased volume that's the same as powder charges that vary ± 1/8 to 1/9 gr. Most people using the best technique and measures can't throw charges any better than that. :eek:

You're ahead by spending your time shooting rather than fiddling around with your cases.
 
Thanks that helps. I'm loading a tight necked 6ppc out of a SGY built rifle using Lapua brass. Using remchester brass in a tight necked 6.5x257ackley that has a lot more wall variation than lapua. Most of the lapua is no more than 0.002" variation. Those lapua cases are a lot harder to turn than the other stuff.
 
Don't know what kind of neck turner you're using, but if you can turn under power it's a lot easier on you and easier to get really uniform necks. I use a K&M and a cordless screwdriver to turn the shellholder which makes it a LOT more pleasant job. Almost as much fun as dental work....:eek::D:D
 
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