Billnpatti
Cannon
- Joined
- Aug 11, 2008
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A few days ago, I got into a discussion about using 000 buckshot in a .36 caliber rifle. I remembered doing a study of the variance in weight and size of Hornady 000 buckshot. To make these determinations, I used a precision electronic scale to weigh the balls and a Sterett micrometer to measure the diameter of the balls. Because the scale is electronic and, while quite accurate, it can be subject to drift. For this reason, the scale was watched to see that it returned to zero between each weighing.
I weighed and measured 365 balls. The mean weight was 65.0 grains with a minimum weight of 64.2 grains and a maximum weight of 65.7 grains. The standard deviation was 0.2 grains. 79.54% of the balls fell with in 1 standard deviation of the mean.
The mean diameter of the balls was 0.351 inches. The minimum diameter of the balls was 0.349 and the maximum diameter was 0.355. the standard deviation was 0.003 inches.
My conclusion is that while the deviations are not great, they are a bit more than a person may have thought. The differences are enough to warrant weighting and sorting and selecting those balls that are the same weight when doing bench rest shooting for load development. For offhand shooting at targets or for hunting, I don't believe that there is enough difference in the balls that the average good shooter will be able to tell the difference on the target.
I weighed and measured 365 balls. The mean weight was 65.0 grains with a minimum weight of 64.2 grains and a maximum weight of 65.7 grains. The standard deviation was 0.2 grains. 79.54% of the balls fell with in 1 standard deviation of the mean.
The mean diameter of the balls was 0.351 inches. The minimum diameter of the balls was 0.349 and the maximum diameter was 0.355. the standard deviation was 0.003 inches.
My conclusion is that while the deviations are not great, they are a bit more than a person may have thought. The differences are enough to warrant weighting and sorting and selecting those balls that are the same weight when doing bench rest shooting for load development. For offhand shooting at targets or for hunting, I don't believe that there is enough difference in the balls that the average good shooter will be able to tell the difference on the target.