Ballistics spreadsheet discussion

[DouglasCole]

Ballistics Spreadsheet Google Docs

SimonAce's Blog

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Three links for my spreadsheet. Wanted to move this here to keep from derailing the controllability thread on .40 S&W overmuch.

Edit:

I'm posting this up front because it's come up a few times. The published in-sheet data for the 7.62x25mm Tokarev is very wrong. Use these values insted:


INPUT
7.62x25 Tokarev
Chamber Pressure 35000
Barrel bore 7.62
Case Length 25
Chamber Bore 7.62
Barrel length 120
Bullet Mass 86
Aspect Ratio 1.5
Burn length 10.5
Projectile Caliber 7.62
Total Accelerated Mass 86
Expansion Ratio 1.5
Projectile Load 1

This isn't the hottest load out there by a long shot, but it's representative of an "average" cartridge. My understanding is that the hottest load is 35-40,000 psi and develops 760J from a 120mm barrel with an 85 grain bullet.

The values posted above will give the damage listed in High Tech (3d) when fired from the 260mm barrel of the PPSh-41, about 11.3 points of damage.