Stopping Power does not work on Bolter. Either the weapon card is wrong or the weapon profile.
Currently, Bolter uses control_stat
(Collateral) instead of power_stat
(Stopping Power).
https://github.com/Aussiemon/Darktide-Source-Code/blob/bb4d54860d306a41e77ea0fccc38f2f75b7bfe2e/scripts/settings/equipment/weapon_templates/bolters/bolter_p1_m1.lua#L617
Can be verified by testing different Bolters with same Damage but varying Stopping Power stats: Damage against armor types does not increase.