Of guns I've actually fired...
44 magnum revolver.
A pistol, not too sure as to what calibre.
8 gauge shotgun.
And my dads pet project, of a heavily modified m14. Damn that was good fun.
But in the end, probably the remington bolt action rifle... nice wood stock, good recoil, nice sights, accurate, good for ranges (I was firing on about 250 yards +. not to brag, but all but my first shots were on the torso or head.

(First shot was too low I then corrected and fired the rest fine.)) I'm not sure as to the name to be frank. I'd have to ask.
Best gun I've fired was the Bor Rifle... That was at a special gun event down at the range.
It felt right in my hands, and I was pretty damn accurate.
Now for video game guns, has to be the L85A1. Man I love that damn thing.