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Second Range Report on John's .338 MAI
Old 04-02-2005, 01:26 PM
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Default Second Range Report on John's .338 MAI

There's bad news and good news. The bad news first.

Got a chance to get back to the range yesterday. Took John's MAI, Rick's .338 Win Mag, Larry's .338 Win Mag, and my .45-70 Buffalo Classic. Great day for shooting.

Based on the preliminary range data, John wants me to shoot two groups of three shots each for each of three charges - 53, 53.5, and 54 grains of Vihtavouri N-150. I did. I processed the data in a way that produced 3 targets for each of the charges. A 6-shot group (the combined 3-shot groups) and one each for each of the 3-shot groups. For clarity, I'll post the graphs and numbers for each charge in a separate post. (In this thread, just in sequential posts.) Here are the numbers and graph for the 53 grain charge.

Since no one seems to be interested in the equations, (that's just fine with me - I only presented them for those that wanted to see how I derived the numbers), I've condensed the equation sheet to just the pertinent data. The "Average Point of Impact" is the center of the x-axis (windage) and y-axis (elevation) points of impact in inches from the Point of Aim. In other words, the center of the group relative to the Point of Aim. "Max Spreads" are the windage and elevation maximum spread of the actual bullet holes. "Length of X and Y Axes" are the max dimensions of the 95% prediction ellipse, and the "Area of the Ellipse" is the area in square inches of the 95% prediction ellipse.

Attached Images
File Type: jpg JT MAI 200 CTST 53g of N-150.JPG (52.7 KB, 123 views)
File Type: jpg JT MAI 200 CTST 53g of N-150 eqn.JPG (12.2 KB, 117 views)
File Type: jpg JT MAI 200 CTST 53g of N-150 a.JPG (84.6 KB, 116 views)
File Type: jpg JT MAI 200 CTST 53g of N-150 a eqn.JPG (12.9 KB, 122 views)
File Type: jpg JT MAI 200 CTST 53g of N-150 b.JPG (48.9 KB, 104 views)
File Type: jpg JT MAI 200 CTST 53g of N-150 b eqn.JPG (12.9 KB, 118 views)
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