Spread Sheets and Testing Ammo

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Spread Sheets and Testing Ammo

Post by fc60 on 1/16/2018, 9:59 pm

Greetings,

A fellow shooter introduced me to using a Spread Sheet to "forecast" velocity.

I recently tried it with some 45 ACP loads.

Bullets are H&G 130 cast of LinoType
Powder is Bullseye, Lot#669

Interesting to note that the FORECAST was within 6 FPS of the actual values.

Cheers,

Dave
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fc60

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Join date : 2011-06-11
Location : South Prairie, WA 98385

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Re: Spread Sheets and Testing Ammo

Post by S148 on 1/16/2018, 10:19 pm

The statistical term is linear regression.  If the data is more-or-less linear (a straight line), the predictions are close.  I've found that most handgun powders are more-or-less linear in the range we usually use them.

S148

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