5-8% toughness on Chained Hit.
Hitting an enemy gives them 1-4 stacks of 2.5% Brittleness. Debuff lasts for 5 seconds and can have a maximum of 16 stacks.
5-8% Strength for every 10% of magazine spent during continuous fire. Stacks 5 times.
2-5 bullets loaded from Reserve on Critical Hit.
Can swap Charmed Reload for Overwhelming Fire for even more boss damage.
Full ogryn guide: https://darktide.gameslantern.com/user/nrgaa/guide/complete-post-rework-ogryn-guide