Ballistics - Fixed 6.5mm magazine config

[ulteq]

When merged this pull request will:

• Add new 20rnd 6.5mm Creedmor and 6.5mm Lapua Scenar magazines
• Fix incorrect QBU-88 (DMR_07_base_F) initSpeed
• Fix 30rnd 6.5mm Creedmor and 30rnd 6.5mm Lapua Scenar magazine initSpeeds

Closes: #4636

[KaiSforza]

I just have to wonder why the caseless ammo is a higher velocity than the cased ammo. Shouldn't it be the opposite?

[KaiSforza]

Did you mean for this to be 815, and the caseless to be 808, as you did for the Scenar?

[KaiSforza]

Also, just looking at the data from that test I linked in my previous PR and from other places, it seems like the base speed (if we're considering a 16" barrel the base speed for the 6.5mm cartriges) should be around 760 for the creedmoor and lapua ammo.

[ulteq]

I just have to wonder why the caseless ammo is a higher velocity than the cased ammo.

We currently do not simulate caseless ammo. We assume that all vanilla 6.5mm rounds are cased.

The muzzle velocity vs. barrel length mapping happens here:
https://github.com/KaiSforza/ACE3/blob/6fddb787e3d05610f206e0c19c7330f3f866e521/addons/ballistics/CfgAmmo.hpp#L188-L189

This is our current config for 6.5 mm Creedmor:

        ACE_muzzleVelocities[]={750, 820, 840, 852, 860};
        ACE_barrelLengths[]={254.0, 406.4, 508.0, 609.6, 660.4};

I just have to wonder why the caseless ammo is a higher velocity than the cased ammo.
The magazine initSpeed is multiplied by the weapon initSpeed.

MXM: initSpeed: 1.01842 30Rnd_65_Creedmor: initSpeed: 815 -> Muzzle velocity: 830
DMR_07: initSpeed: 1.06946 **20Rnd_65_Creedmor:** initSpeed: 808` -> Muzzle velocity: 864

The net muzzle velocity is higher even though the magazine initSpeed is lower.

Also, just looking at the data from that test that was done it seems like the base speed (if we're considering a 16" barrel the base speed for the 6.5mm cartriges) should be around 760 for the creedmoor and lapua ammo.

I'm more than willing to change the muzzle velocity vs. barrel length mappings when you can provide us plausible data for any ammo type in question.

Just curious, where did the 1.06051 come from?

I calculated it off the desired magazine initSpeed and the muzzle velocity vs. barrel length data.

It needs to fit into the following equation for as many magazines as possible:
weapon initSpeed = correct muzzle velocity / magazine initSpeed

[KaiSforza]

Read the comment that was just posted, I approve of all the changes.

[bux]

i can't say anything about the values, but the config seems to look fine.