Most of the ammo values in Vavoom for Strife is incorrect.
I'm not going into total detail.. but examples of incorrect values include:
Crossbow - should give 8 electric arrows (16 in the easiest/hardest mode), in Vavoom.. it gives 20 electric AND 20 poison arrows.
Grenade launcher - should give 8 explosive grenades (16 in the easiest/hardest mode), in Vavoom.. you are given 20 explosive AND 16 phospherous grenades.
Please use vanilla Strife or ZDoom to get the correct reference values for all the ammo values.