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Posted: 6/26/2011 2:13:39 PM EDT
| have got to be the most frustrating aspect of reloading. I'm in the process of developing loads for my new bolt action .308. I am using new Hornady brass with IMR 3031, CCI LRP's, and Hornady 168gr BTHP's. I'm loading for an OAL of 2.800" and getting OAL's ranging from 2.805 to 2.795. Am I seeking a result that is unobtainable? IOW is this about the best consistency I can expect? |
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Grab 10 to 20 bullets from the box you loaded.
Examine the meplat on each bullet. Compare the bullets, note the differences. Now, measure the length of the bullets, and if you have a nylon bushing or a Stoney Point/Hornady bushing for measuring case head to bullet ogive, measure the length of each bullet from its base to its ogive. Write each dimension down in your note book. Maybe make a note about what you discovered about the meplats. Use the same bushing or Hornady tool to measure the length of the loaded ammunition from case head to bullet ogive. Write these dimensions in your notebook. Make sure you include the bullet type, date, and other information. After you make these measurements, you'll have your answer. |
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That depends on the quality of the bullet. What bullet and how much difference are you measuring?
Every bullet will seat to a slightly different length simply due to minor differences in the bullet and play in the press. Try seating a bullet, take a measurement, then put it back in the shell holder and push into the seater again. Or seat one with light pressure on the handle, then one with hard pressure and compare the measurements. You'll find different measurements every time. Your thumb on the caliper is worth at least 5 ten thousandths with minor change in the pressure while taking the measurement. |
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