ive had some amazing results with LilGun. and i just scored my first pound of 1680. as soon as the weather breaks i'm off to the range to test with that as well.
lil gun cycles well, accuracy is good, achieving good velocity without pressure is easy, and the ES/SD numbers are fantastic. I'm running 125gr projectiles w/ moa accuracy at 2050 fps and have been able to find a common load for 3 different projectiles that all have very similar velocity's and point of impact. its nice to be able to grab 3 different bullets and have them all hit the same spot
i also use 4227 for heavier projectiles - subs cycled great with it. now that i have 1680 though my 4227 is gonna be used under m-80 pulls that i got super cheap a while back.
Have done some preliminary testing with H110 but since i've only got a small amount and its about as common as [beeep] on a bull moose i'm not pressed about it right now. one thing i can say about h110 - watch for pressure on the top side. It can go from normal/safe to 'holy crap thats a flat primer' pretty quickly - like a half grain jump quickly. lots of folks are using it with great results from what i've been able to read - if you can find it anyway.
for hunting stay with lighter projectiles - 110-125 grain stuff. 110 Vmax, 110 Varmageddon's, barnes 110 Tac-TX "blacktips", 125 SST's, 125 nosler BT (Green tip). and i've also had some respectable luck with resizing 123gr zmax .310's (ak bullets) down to .308 with a lee push through resizing die.
i've also heard of lots of people having good luck with using 125 TNT's as well but i havent tried them myself yet.
the hardest part about a hunting projectile is maintaining proper velocity for expansion at the ranges you're going to hunt, hence why the blackout shines in the 110-125 range. getting enough velocity to make a typical >150gr .308 hunting bullet expand at blackout speeds is why most folks use the heavier stuff for plinking, unless you're specifically buying top shelf low velocity expansion projectiles (at $1 and up each)