That is not normal in my experience. Surprised to hear that TTSX have. Rep for poor accuracy. I’ve had the exact opposite experience. Most accurate and easiest load development I’ve ever done. 165 TSX and 150 TTSX are the most accurate bullets in my Hawkeye .300 win mag. Each produced 1” groups at 100 with the first and only powder I tried. It’s a hunting rifle and I’d rather be scouting than trying to reduce group size under 1”.
Yes you do have to let them jump. That maybe why they worked in my Ruger so much better than other bullets I tried (Nosler ballistic tip, gameking, SST, accubond). The Ruger has a short mag, so seated so they fit in the magazine results in .080 jump IIRC.
The TTSX is wicked deadly on deer. I’m shooting the factory 100 TTSX ammo in my .25-06. 3,300 fps published MV, but the savage is only a 22” barrel, so real world 3,100 to 3,200 fps. Shot two deer so far, both this year. One at 60 yards the other at 180 yards. Neither took a step. Dropped like they were hit by lightning.
Go substantially lighter than you normally would and drive them FAST. The 150 gr worked well in my .300 win mag. Shot a buck quartering slightly toward me. He managed to run 30 yards. I’d go 130 gr in my .300 for deer if I was starting over. Wouldn’t hesitate to use that 150 on elk or moose.
Bonded bullets typically retain 80% of their initial mass while TTSX retain nearly 100%. So take the bullet weight you would normally use for a particular animal and multiply by 0.8 to estimate which TTSX to try. You like 165 grain .308 cal bullets for deer? Then try the 130 gr TTSX.
Can’t wait to work up a load with the 120 gr TTSX for my .280ai. Hope to reach 3,400 fps.