If you want to DD on thf with ranged attacks then I know our best option is to go with Culverin and Cannon Shells. But on my server Cannon Shells are hard to come by and expensive. 10k for 12 shots adds up fast. Not to mention hell for my inventory.
So I was looking into our next best ranged attack options for when you go /rng or /cor. I found:
Shark Gun DPS: 402
DMG:39 Delay:582 Ranged Accuracy+5
with Iron Bullet DPS: 1375
Perdu Bow DPS: 633
under 100tp: DMG:42
Ranged Attack +15,
Ranged Accuracy +5
with Kabura Arrow DPS: 2533
I know we can use Antlion Arrows also but again those are hard to get and not cheap either.
At first sight it looks like Perdu Bow wins easy. It has better dps and better stats. But then I realized you can't use quick draw with a bow for when you go thf/cor. And there is a skill difference of 10 points at level 80. Archery 245 and Marksmanship 255 points. On top of that I have 8/8 marksmanship merits. So 271 marksmanship a difference of 26 skill points. For food I would use Pot-au-feu.
At which point will the Shark Gun beat Perdu bow?
Both options are rare/ex and cost a lot of imperial standing. So testing this myself is not easy to do.