chapters, no matter how they are organised, have around 1k brothers.
tho some chapters like the mantis warriors or the lamenters, who suffered terrible losses, can go down to 200 battle brothers, after which, the chapter is broken up and the able fighting men absorbed into other chapters.
also, 1k does not mean 1k all around.
979, 1021, 1125, 960, all are roughly 1k.
no chapter is allowed to grow substantially more than 1k.
as for the black templars, many of them are neophytes, or scouts. coz they use mixed battle groups of both full marines and trainees. tho i doubt that 5k figure is genuine.
Talk:Black Templars - Lexicanum
always check the talk pages xD
DM, as i said, broadsides, the bigger ones, with limited jump capablities.
i dont think a dread can stand against the fast crysis suits, unless it catches them off guard xD not very likely.
can we please stop talking about blood ravens???
the whole storyline makes me cringe.
also, no chapter can be descended from the traitor legions, coz their geneseed was given to the raven guard to keep safe near the end of the heresy, but the alpha legion stole it from them.