I love the look of the Buck 110-style knives, and the heft is nice too. I like the old Schrades too, and I have both now, and I agree both are too big for regular pocket carry.
Back in '81 or so, I traded for a U.S. Schrade LB7, their clone of the Buck 110. (In high school, I did carry my old Schrade LB7 upright in my back pocket, next to my wallet.) All of the old U.S. Schrades and most of the Buck 110 style lockbacks that I've owned have been outstanding, but some of the old Schrades were better than others. And I've had Bucks that were all over the place as far as fit, gaps, scale finish, blade grinds, etc. But honestly, for around $40., they're still one of the best deals on the market.
While I was in the navy in the 80's, I knew Boatswain's Mates, supply guys, Marines, and at least a couple of helicopter aircrewmen who carried Buck 110 style lockbacks as well - U.S. Schrade, Kabar, Camillus, Case, etc., as long as it had a stainless steel blade. (Some aircrew would carry the 110, in lieu of the standard survival knife, if they were allowed to by squadron policy.)
The U.S. Schrade LB7 types weigh a little more than the Buck 110's, IIRC. Fit & Finish on the old Schrade is the best of any lockback I've ever seen, and it's been through hell. No play in any direction.
In 1996, I bought a U.S. Schrade 7OT, and I worked the handle edges down to look & feel more like the Buck 110. (Bottom knife here.) This old 7OT has seen the most hard use, bordering on abuse, of any of my knives, and it's still tight, with just an itty-bitty-little-bit of side play.
~Chris