[Blink_Dog]

I would just ignore their range value and keep damage/Pen the same.

If this helps at all here is how I am equating for my rules set:
20" Barrel length, Both FMJ:
.30-06 Dam: 6, Pen:x1, Range: (20x2.7)= 54 m (point blank range), Max Range: (54x20)= 1080 m
.270 Win Dam: 6, Pen:x1, Range: (20x3.1)= 62 m, Max Range: (62x20)= 1240 m

I determine range using a rng x multiplier = Vel (m/s) / 300. so a slow round will have a point blank range less than the barrel length etc.