If you're going to mount it on a tank there's a fun matching of the standard PPC and Tbolt ranges. The ammo per ton thing becomes a strange issue because of the lack of tonnage saving techs for tanks other than XL and Light engines, which have no drawbacks for tanks in combat. Vs a GR... are weapon crits more common than ammo crits? I suppose that's really the question for me.
cough*FF*cough
They're not. However, it's slightly easier to guard against weapon crits since there's a 50/50 chance of whether the attacker or the controller chooses which weapon takes the crit if there's more than one weapon in the location. With an ammo crit, it wipes out all the ammo on the vehicle.
Weapon explosions in tanks can also get weird when CASE is involved, GR in turret goes up? Rear armor stripped off
Because if you're going to use a 10 point damage weapon that has a range of 18 hexes, you might as well use a PPC.
In tanks, the kings of ammo weapons not so
As for the weapons itself, it's a really odd design, normally as launchers get bigger they throw more missiles, not bigger ones, it doesn't compete with much, yet it's gimped like most but not all non-intro weapons