[Pirtti]

Battletech ammunition is by and large APHEX (or Gauss bowling balls) because the armor is, by GURPS standards, ablative and Hardened. Thus the armor divisors in the modern tank gun examples don't really work in the BT universe.

I don't think the comparisons to modern AFV armor are useful either - there aren't any around in 3025 and BT logic is quite different. Not having massive damage and DR values makes the game run a bit smoother and it's easier to stat PBI and Battle Armor without everything going splat in the first second. To avoid rifles ripping 'Mechs apart, perhaps the ablative armor should have a non-ablative "threshold" DR layer, something like DR 15-20 regular scale.

You could just give the 'Mechs x ablative DR as armor, then another y ablative DR as internal structure, using the original hit location tables for 'Mechs, scaling the armor from the original using whatever GURPS damage the PPC is given (the most convenient since it's 10 damage in the tabletop).

I've wanted to do something like this since the official RPGs treat 'Mech vs. infantry combat really shoddily. MW 2nd Edition has perhaps the best rules for such occasions, but the rest of the rules really suck. From 3e on they introduce the armor-piercing mechanic which really doesn't mesh with how 'Mech armor is written up.

I want less tabletop and more novel for my BT games, so no tabletop arguments, please. I just rip whatever's convenient.