I tried Autobolt rifle and Heavy bolt rifle on Tactical against Absolute Tyranids with the perk Aligned Aim (+15% range damage) and the prestige perk Acuity (Each consecutive headshot increases headshot damage by 2%, up to 10%. The bonus lasts 5 seconds without a headshot) AND Balance Distribution (+10% primary weapon damage).

 In these conditions, the damage is really solid. You can take down Majoris and Zoans genuinely fast. I was surprised at how effective it was - awesome!

 But if you take the same weapons on other classes - they feel extremely weak. For example, I don’t see the point of taking the Heavy Bolt Rifle on Heavy at all. If Heavy could have a knife along with that rifle - then it’d be a different story.

Some gameplay if you want check it yourself (most epic moment at 55:50)