oktx- my 243 ultra will not stabilize 100 grain bullets, but is dead on with the lighter stuff (3 rounds all touching at 110 yards with 80 grain bullets) so I called and talked to a rep at Sierra Bullets that happens to use a 243 for deer. He claims that their 85 grain Gameking will stop a Whitetail in its tracks. I am going to try loading some up this weekend and see what happens. Good luck.
PS Welcome to Texas. Its a great place, I'm a transplanted Californian and love it here.