I was doing some preparation for running Final Sanction and Oblivions End when I started to think about what kind of weapons the Deathwatch marines can pick up from fallen PDF and/or get from Imperial Stores... and thats where the problems started: It seems that DW system is not designed to scale with DH/RT in any way...
A little example:
Astartes Bolter (DW) dmg2d10+5/pen5
Storm Bolter (RT) dmg1d10+5/pen4
Angelus Bolter (DH) dmg2d10/pen5
Plasma Gun (DH) dmg1d10+6/pen6
Plasma Gun (RT) dmg1d10+7/pen6
Melta Gun (DH) dmg2d10+4/pen12
Melta Gun (RT) dmg2d10+8/pen13
What is even worse than the fact that none of the systems have same weapons (melta, plasma) with same stats is that Angelus Bolter and Rogue Trader Storm Bolter are specifically described as firing Astartes calibre bolts... Storm Bolter (version RT) is even said to be the same weapon Astartes use. Now, when you look at marine stats (TB8 /Armor 8), I agree Astartes boltgun needs to do at least 2d10/pen5, probably 2d10+5/pen5 to have the penetration and effect it is supposed to (its supposed to be able to kill a marine), but then marine "heavy weapons" like the Storm Bolter, Plasmaguns and Meltas start to look like toys... They need a significant boost in damage, at least doubling their current effect. The problem is, however, that then they turn out to be hellishly powerfull in DH/RT environment...
So I don't know. Maybe I just need to throw all DH/RT material out of window when running DW and scale everything different just for DW. For band-aid I'll go and implement Philip Sibberings idea for Astartes ammunition stores and give each DW marine 8+1 magazines for their bolters. At least then they should not need to pick up some other stuff too quickly.
(Not saying that it is a bad solution, BTW. And completely amusingly, from memory that would be a very similar solution, and number of reloads, that I had when I statted up AAPA in
GURPS Crunch
, I mean
Vehicles
.)