I would not want to be at odds with my PH! You are dependent on him for success… If you don’t agree, discuss it, and get it sorted before you just show up with what you want.
I’ve used a lot of different bullets over the years in 30 caliber, including jacketed lead-core, bonded, and mono-metal: partitions, bonded, lead, different varieties of core, and types of tipped bullets. I do prefer Barnes bullets, because I’ve killed hundreds of animals with them over the years and none have run off injured and not been recovered in a short period of time the same day.
That said, I use Barnes TTSX and TSX and find them to be very accurate. They are also very effective on most animals in a variety of calibers. I use them in my .22-250, .243, 7MM REM MAG, and several .30 Calibers including my .375 H&H on Buff, Croc, Hippo. Don’t think of the bullet weight as a primary factor. If you hand load, you should appreciate ballistic coefficient. My most accurate rifle is a 300 RUM and uses a 210 grain bullet at extreme range (out to 2,000 yards) and this I’ve achieved several times in shooting schools and competitions. I don’t hunt at long range as a practice. And, I don’t like to target shoot. I do it so that I’m certain that I can validate, in progression, that the rifles and chosen ammo I hunt with are predictable at all distances I may encounter while pursuing game.
I am trying to make the point that there is a lot of math and science put in to bullet technology and load development to figure out accuracy. It’s easy to go down an unfamiliar rabbit hole trying to obtain a desired outcome. I’m not sure, I could diagnose your rifle’s issue with Barnes bullets without understanding your processes. Clean your rifle well, go back to the range, foul it in, and then start with the basics to get your desired outcome. I belong to a couple other sites that deal with accuracy issues and provide helpful Information on bullet choices and load development at all distances/ranges. You may want to try there.
**I only contribute content here on AH and I try to post, in detail, my first hand experiences.
Good luck!