Sizing, Seating, and Wilson Die

E

Enahs

Guest
With regard to the use of your Wilson bullet seating die (or any other, for that matter), do you find that it makes a difference in concentricity consistency, precision, etc. as to whether you are FL, neck, or partial neck resizing — all other things being equal with respect to case concentricity.
 
goodgrouper said:
Used to worry about case concentricity but not since my own experiments proved it was not much of a factor for shooting aggs. I want my ammo to function properly. That's the main thing. And that WILL influence your shooting for sure. If you only neck size and don't stay on top of how many times each case has been fired since the last FL size, it's real easy to get a round that won't go in the chamber or won't come out easily. Either situation will put a pause in your rythm and distract your attention from conditions. Or it could even shut your gun down completely.

Set up your FL die to just barely push the shoulder back and shelve your concentricity gauge. That's my $1000 tip that I wish someone had shared with me before the cash was spent!
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Welll...... ummmm...... All's I can say is.......

You must have a fine gunsmith.

al
 
Gentlemen — it was not my intention to start another Hatfield-McCoy "discussion" on whether concentricity matters. I am just curious as to what folks find when it comes to concentricity and bullet seating given the nature of a case holding seating die (especially like Wilson, Redding, Forester). Do you find that sizing makes a difference in the bullet/case concentricity that you ordinarily get (given that a FL size will yield a looser fit in the die)? Or is the difference so minimal as to have no effect? Of course, if you don't pay any attention to concentricity and believe it is a worthless pursuit, you wouldn't know — or care. GG, why did you ever spend $1000 on a concentricity gauge. My tip is that you can get first rate stuff for far less than that!
 
I think that with something like the typical 6PPC Benchrest rifle, that if you have a straight FL die/bushing combo, or a one piece die that is the right size for your chamber, and are running typical neck clearance, with the bullet seated so that the rifling marks it, that rounds are straightened to an acceptable minimum runout when they are chambered. In my rifle this is .0015 measured about 3/16 in front of the neck. IMO concentricity gauges are best used to diagnose equipment problems. Once a set of dies has passed the test, there is little reason to use one, except to occasionally check to see if anything has changed. If the cases are straight from sizing, and the fit is good on one that is neck sized, the little bit of difference with a FL sized case shouldn't matter. A properly fitting FL die should not change the size of the case much at all. Of course all of this is predicated on the use of good brass.
 
"I've shot teen aggs with ammo that wasn't flatlining my gauge enough to know concentricity is over rated." "Give me a number." √-1
 
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goodgrouper said:
What do you mean Al?
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If your gunsmith has you set up with a perfect match between YOUR die, YOUR brass and YOUR chamber, not some agglomerated mishmash of off-the-shelf dies, then there's really nothing you can do to screw it up except try to make your own cases and bugger the clearance.

If, on the other hand you have the mismatch common to 99.99% of all the setups out there then there's NOTHING you can do to make straight ammo work any better than crookedy stuff.

bottom line is when that 600lb hammer falls on the back of the bullet ain't NUTTIN' matters except fit.

And a good gun

al
 
goodgrouper said:
And a good set of windflags.;)
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True but......

A good gun makes it easy(er) and a good barrel....

Well I'd better just avoid that road :)

Some setups are spooky, that's all I can say. I'm not a good enough shooter to really have an opinion.

al
 
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