Some feedback from my gaming group is that they are a bit put off by Deathwatch due some balance issues, specifically the damage potential difference between their classes, which primarily focus on melee damage, and me, as a devastator. Me, being desperately obsessed with the 40K universe, want to try to determine if perhaps I’m applying any of the rules incorrectly, to see if I should be toned down a bit from how we have been playing, as I don’t want everyone to switch to a different game system. I know that the concept of devastators being OP'ed has been discussed here, I'm just wanting to make sure I'm playing it RAW first, then maybe nerf myself later if I am.

Please look over the combat below and see if I’m applying everything correctly. My target is a Daemon Prince, about 40 meters away, with no intervening cover.

My ballistic skill is 53, I’m using a Heavy Bolter and I roll a 22. I am using regular ammo and I have the Mighty Shot talent.

I get +20 for shooting an Enormous target, +20 for shooting full auto, and +10 for shooting a target at short range, for bonuses up to +50. That bumps my BS to 93. According to my figures, I hit him with 7 degrees of success, meaning 8 hits. I roll for damage. (2d10 plus 10, tearing)

I roll 4, 6, and 9 and discard the 4 for a total of 15. I add 10 and add 2 for Mighty Shot. Total damage is 27 Pen 6. Daemon Prince’s armor is 12 and TB is 12, meaning I do 9 damage.

I roll 3, 4, and 6 and discard the 3 for a total of 10. I add 10 and add 2 for Mighty Shot. Total damage is 22 Pen 6. Daemon Prince’s armor is 12 and TB is 12, meaning I do 4 damage.

I roll 4, 5, and 7 and discard the 4 for a total of 13. I add 10 and add 2 for Mighty Shot. Total damage is 25 Pen 6. Daemon Prince’s armor is 12 and TB is 12, meaning I do 7 damage.

I roll 7, 8, and 9 and discard the 7 for a total of 17. I add 10 and add 2 for Mighty Shot. Total damage is 29 Pen 6. Daemon Prince’s armor is 12 and TB is 12, meaning I do 11 damage.

I roll 5, 5, and 8 and discard the 5 for a total of 13. I add 10 and add 2 for Mighty Shot. Total damage is 25 Pen 6. Daemon Prince’s armor is 12 and TB is 12, meaning I do 7 damage.

I roll 2, 5, and 9 and discard the 2 for a total of 14. I add 10 and add 2 for Mighty Shot. Total damage is 26 Pen 6. Daemon Prince’s armor is 12 and TB is 12, meaning I do 8 damage.

I roll 3, 7, and (1)0 and discard the 3 for a total of 17. I add 10 and add 2 for Mighty Shot. I roll an extra d10 for Righteous Fury and get a 4. Total damage is 33 Pen 6. Daemon Prince’s armor is 12 and TB is 12, meaning I do 15 damage.

I roll 1, 9, and (1)0 and discard the 1 for a total of 19. I roll an extra d10 for Righteous Fury and get a (1)0. I roll an extra d10 for another Righteous Fury and get 6. I add 10 and add 2 for Mighty Shot. Total damage is 47 Pen 6. Daemon Prince’s armor is 12 and TB is 12, meaning I do 29 damage.

Assume that the Daemon Prince has already dodged this round and has previously used/burned all of his Fate Points. He has 80 wounds. I did 90 damage (9+4+7+11+7+8+15+29=90). Did my level 1 devastator just “one-shot” a Daemon Prince?