Tracy,
I don't have experience with the 110 TTSX but I've been working with the 120TTSX in my factory 7-30 Waters 21" Contender barrel. I hope something from this might help you out a bit. I was just checking my notes so that I can get you the true story. Looks like I loaded up some 120's back in 2014 with AA2460 at 50 thousands from the lands. Five shots went in 3 1/4 inches. I got sidetracked and didn't get back to this project until last fall at which time I played with seating depths, powders, and charge weight. I finally settled on 34.0 gr of AA2460 seated .082 off the lands. I was getting repeated groups of 1 - 1 1/8" at 100 yds. My chronograph shows this load at only 2604 fps (at 45 degrees) but I'm happy with it as a mule deer load in the woods.
By the way, this barrel seems to be very fussy - far more so than any other Contender barrel I've worked with. It shot Sierra 100 gr HP's into about 1 1/2 inches but did not like Hornady 120 SP's, 139 Hornady SST's, or Speer 120 SPBT's. I worked with W748, H4895, IMR 4895, and AA2460. I also tried the Federal 120 gr factory loads and they shot 3 + inch groups.
Please report back. I'd be interested to hear how your load development proceeds. Hope your barrel is less temperamental than mine!
