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Rifles, Reloading, Optics, Equipment
Reloading
What first? Powder or seating depth?
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<blockquote data-quote="rscott5028" data-source="post: 557704" data-attributes="member: 24624"><p>Fitch,</p><p> </p><p>You are correct in that seater stems don't make a single contact ring precisely at the datum line. Nonetheless, seat your bullets and measure the OAL to the datum line using a Hornady or Sinclair OAL guage and you'll find that they are very consistent with quality dies and a good press. ...should be less than .001" extreme spread. </p><p> </p><p>While knowing the exact jump isn't necessary, there are methods for measuring to within .001". However, throats errode. So, it's something you should monitor if group size opens up over time. </p><p> </p><p>Sorting bullets won't improve the variabilty in the amount of jump. But, it will improve group size to some small degree. </p><p> </p><p>Most agree that straight ammo shoots better. The disagreement comes from the notion of straightening ammo and what actually happens to the neck when you attempt to bend them back in place. </p><p> </p><p>With good brass, equipment, and methods, you should be able to consistently produce cartridges with .002" TIR or less. Zero TIR is ideal, but you can still get .5 MOA with .003" TIR in a good rifle. </p><p> </p><p>Regardless of any disagreement on the technicalities, folks who are getting good accuracy should carry on. And, those who are having difficulties should study up and methodically go about proving/disproving the theories through practical application. </p><p> </p><p>Best of luck to all,</p><p>Richard</p></blockquote><p></p>
[QUOTE="rscott5028, post: 557704, member: 24624"] Fitch, You are correct in that seater stems don't make a single contact ring precisely at the datum line. Nonetheless, seat your bullets and measure the OAL to the datum line using a Hornady or Sinclair OAL guage and you'll find that they are very consistent with quality dies and a good press. ...should be less than .001" extreme spread. While knowing the exact jump isn't necessary, there are methods for measuring to within .001". However, throats errode. So, it's something you should monitor if group size opens up over time. Sorting bullets won't improve the variabilty in the amount of jump. But, it will improve group size to some small degree. Most agree that straight ammo shoots better. The disagreement comes from the notion of straightening ammo and what actually happens to the neck when you attempt to bend them back in place. With good brass, equipment, and methods, you should be able to consistently produce cartridges with .002" TIR or less. Zero TIR is ideal, but you can still get .5 MOA with .003" TIR in a good rifle. Regardless of any disagreement on the technicalities, folks who are getting good accuracy should carry on. And, those who are having difficulties should study up and methodically go about proving/disproving the theories through practical application. Best of luck to all, Richard [/QUOTE]
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Forums
Rifles, Reloading, Optics, Equipment
Reloading
What first? Powder or seating depth?
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