trim to lenghts and 38 sp...

R

ruger22

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BC, sunshine coast
Last year I bought a few revolvers, a case of white box ammo and a dillon 550b.
My goal is fun target shooting and to improve my skills and shooting.
I was given random collections of used brass.
Now I have a mix of about 1200.

My revolvers shoot nice groups, but with the occasional flyer.
The flyer might be off 4" in any direction.
My powder charges of win 231 are consistent.

I bought a trimmer and proceed to mike brass.
The outcome surprised me.
Less than 5% need trimming. 10% are 10 thou under.

Lyman says 1.149" trim length.
I adjusted my mike to 1.147 and still over 50% are under.

What to do???
Should I set my mike to 1.146"
Then divide the group in 2.
The short ones become casual use.
The rest I trim to 1.146" and call this my accuracy group?

What to do???
 
The primary purpose IMHO of trimming revolver cartridges is so you can provide a uniform crimp to the cases. Usually once trimmed you need never go back and re-trim them again. Measure the smallest case you have and trim to that length - assumes the smallest isn't substantially smaller than the rest of the cases.

I doubt your fliers are due to variations is case length or crimp. What ranges are you shooting at?

Take Care

Bob
 
If that is the case you can bet your last dollar the 4" pull is you not the gun or the reloads. I wouldn't get to anal about trimming .38spl brass. Do it once and forget it.

They will eventually split at the mouth from belling or length wise from use before they will need trimmig again.

Take Care

Bob
 
If you are trimming 38spl cases, you are basically wasting your time. You will be able to reload the same cases over and over with little if any variation unless you are loading hot. 38Spl loads are very easy and like mentioned above you will have case cracking from fatigue before you need to do any trimming.
As for the flyers, I too doubt its the ammo ...Practice practice practice..
dB
 
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