His gun is nothing special. His skills are ridiculous
This.
The bug that has him starting out with 100 or over in Guns (instead of 50ish) is what makes him so powerful at low levels. That and he is (as are all companions) aim-bots.
I'm not sure in what way the op thinks Boone's rifle is supposed to be 'better' than the hunting rifle, but it's not. Or at least, not by much. Looking at the Geck, there are a few differences, however. The main one is that Boone's rifle has a much longer "max range." It's equivalent to the Sniper Rifle range (3548), whereas the Hunting Rifle is shorter (2000). Oh and supposedly Boone's has no "skill requirement" (no penalty). The DPS, base/modified shot time, base/modified reload time, all variations of DPS for defined situations (jammed, reload, etc) are all the same.
The other differences are:
Sight FOV (Boone's) 25 - (Hunting) 38
Sight Usage (Boone's) .1 - (Hunting) 1.5
Semi Auto Fire Delay Max (Boone's) .2 - (Hunting) .3
Note that I have no idea what things like "Sight Usage" means.... :mellow: so maybe that's more important than I realize.