Ballistics - Add data for 12 gauge slug

[rekterakathom]

When merged this pull request will:

• Add ballistic data for a generalized 12 gauge slug (assumed to be 12/70)

More data would be useful for barrel lengths and muzzle velocities, as well as the temperature muzzle velocity shifts.

Sources:

• Mass - Wikipedia
• Diameter - Wikipedia
• Muzzle Velocity - Wikipedia
• Ballistic Coefficient - Law Enforcement Ammunition
• Drag model inferred from slug shape
• Barrel lengths are industry standard and inferred from it. 24 inch barrel is a standard testing barrel and the 18 inch barrel velocity is inferred from that assuming a 10% velocity loss See comments

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[Laid3acK]

Sources.

[rekterakathom]

Added sources to where they exist, but some details are inferred / guesstimated due to a lack of good sources. This is not really supposed to be a super accurate model of a specific slug, just a generalization of one because there are so many different slugs that this could be because we aren't told in-game what this specifically is.

[Drofseh]

Added sources to where they exist, but some details are inferred / guesstimated due to a lack of good sources. This is not really supposed to be a super accurate model of a specific slug, just a generalization of one because there are so many different slugs that this could be because we aren't told in-game what this specifically is.

Here is some data, I would probably go with the yellow line.

[rekterakathom]

Here is some data, I would probably go with the yellow line.

Thanks, added the yellow data points

[Drofseh]

This sort of nice draws without the exact conditions of measurements means absolutely nothing, except for automatic fan boys. Several manufacturers have official data about slugs. Too lazy or incompetent, or the both, to check that ?

1. Calling other contributors lazy and incompetent is way out of line, dial it back.
2. This data is from real world testing, not from manufacturers claims.

[Laid3acK]

Abuse or not, manufacturers or not, this sort of graph without the conditions of measurement means nothing, it's like that, happy or not.

BC 0.11, barrel length 30", MV 1610fps: 762mm, 491m/s, not included to the ACE_barrelLengths and ACE_muzzleVelocities values, it's just too easy to do that, the big facility.

There is enough manufacturers slug data to make something serious.

[Laid3acK]

Vanilla shotguns will need to be updated with ACE3 values to work with AB.
Would be also useful eventually to update airFriction and initSpeed according to AB values.