Re: MBT's
The ranges are "high" only because they have to be high in order to get the desired effects at the intermediate ranges due to the high effect of the draw-down in AP values in the code if you used say "3KM" as the max range like it was some sort of atgm.
3km is an effective range, the max sabot range is theoretical. The rounds can go further as in real life, but effect will drop off.
If you took some gun that had say 30cm penetration at the muzzle, and then plonked in 60 hexes max sabot (or AP) range, then looked at the values in APcalc then you would see that your round dives in effect very steeply, and the effect at 20, 40 etc range gates would fall well below the desired effect. Effectively your APDS round would then behave as an APCR/HVAP arrow munition as in ww2 with a rapid fall-off in velocity.
Due to the draw-down effect of the formula baked into the code you must use a max range well beyond the theoretical max effective range so the line goes through the correct data points.
Guns dont stop dead at some theoretical "max effective range" - missiles though will due to wire length, or other fire-control issues.
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