My son shot a javelina on a youth hunt a few years ago. He used my M1 Garand with 150 gr Barnes Vortx ammo. The shot was 75 yards and left a softball size exit wound. No problem with expansion at all. I made the switch to Barnes back in 2008 and have never looked back. I used to be the California condor recovery program lead biologist. Feel free to reach out to me anytime.
I encourage everyone to look for and read the Minnesota DNR's test results for lead vs non-lead bullets. They did it right. The lined up euthanized sheep and shot them with various kinds of bullets: non-lead, high-end and low-ed rapid expansion lead core, high-end and low-end slow-expansion lead core, muzzleloader, and shotgun slugs. They x-rayed every carcass and were finding lead fragments up to 24" away from the entry point. IMHO, MN DNR did the best test out there when the non-lead bullet craze really started taking off and there was all kinds of skepticism. I also have research articles regarding lead fragments in the grind when meat comes back from processors.
Take all of this for what it is or isn't worth to you. I just like to pass on the data I have access to and can share those reports/articles with anyone interested.