The motivation to go from 9T to 8T with the 175 ELD-x or longer bullets is to go from marginally stable to super-stable, and consequently maximize the bullet's BC, not to go from unstable to stable. Check your stability here and make sure the SG is at least 1.5 for the densest air you'll shoot in:

https://www.jbmballistics.com/cgi-bin/jbmstab-5.1.cgi

You lose about 3% of the BC value for every 0.1 drop in SG below 1.5.