Charlie: if you are shooting Double Tap or any of the other more expensive brands of custom ammo, you should be reloading for that SRH of yours and if you are not, then you should start asap, and my recommendation is to begin with hardcast 240-250 gn swc slugs over Unique, 2400, H110 or WW296 powder as these would be perfect for Texas deer and hog, and then if you want to go heavier (which you should not need) you can always go up to the 300 gn bullets.
I believe you can also purchase loaded ammo in that weight range with cast slugs, if you wish. HTH.