The basic premise is that Semi automatic fire is more controllable than Full automatic fire.
Semi then becomes one hit for each degree and +10 to hit.
Full automatic becomes one hit for each degree and +20 to hit.
Has anyone tried this? I've seen this idea knocking around a few times. I'm concerned it might be too much of a kick for Heavy Bolters (I have two devastators in my group).
Out of curiousity (as I've never fired one); what would you consider to be it's practical maximum range in the field, and are all those markings on the sight picture of any use, or more trouble than they're worth?!