The 7mm-08 and 308 are more than enough gun for any deer or hog in Texas. In fact both are enough gun for most if not all hoofed game in North America. You already have a 27 caliber gun, the 7mm-08 is 28 caliber and the 308 is 30 caliber so there is not a whole lot of difference between the 3...

I am a big fan of the 7mm-08, the only advantage to the 308 is the number and availability of different loads..