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Old 10-31-2015, 08:21 AM
HAWKEYE WIZARD is online now
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Sorting Rimfire Cartridges VI -- Overall Conclusions

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1. Equipment is available that will allow practical, efficient sorting of rimfire ammunition by weight, by rim thickness, and by rim-to-ogive length. The equipment that I used for all measurements was adequate for my purposes. The equipment demonstrated good repeatability, and was capable of sorting cartridges into adequately small increments. I believe that the data Iíve presented is factual.

2. Generally speaking, my data supports the conventional wisdom that higher price buys better uniformity, at least where cartridge weight and rim-to-ogive length are concerned. However, that wasnít particularly true for rim thickness where both brands inspected showed similar variability.

3. The quantity of ammunition that Iíve measured may not be adequate to determine what, if any effect the variations have on accuracy. Iíll probably have to invest significantly more time and ammunition to determine whether any effects on accuracy exist. I do believe that the sample sizes I measured above are adequate to support the conclusions Iíve reached herein.

4. In rimfire benchrest matches, I shoot 5 shots off the target just to warm the barrel before I start to shoot my sighters and record shots. Typically I shoot about 50 total sighter and record shots. So, I can cull out approximately 10% of the cartridges by weight and/or rim-to-ogive length to use as warmers without wasting any ammo. Culling that 10% will significantly reduce the weight and length variability of my sighter and record shots.

Last edited by HAWKEYE WIZARD; 10-31-2015 at 01:13 PM.
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Old 10-31-2015, 11:28 AM
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Have you put this on excel with the variables plugged in? be interesting to play with that data once your done.
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