The Model 44 tracker manual says the highest level load is a 240 grain bullet at 1350 fps. I think your best bets will be a 240 at 1200, esp with a cast keith-design bullet, and a 300 grain pill at 1100 fps. The loads are conservative, yes, but they will do the job on deer and hogs. My Tracker has killed 2 hogs with Winchester USA 240 gr JSPs, and hogs are built a little tougher than deer.
ST762