i shot my first deer this year using a 270 win semi. I shot the deer at roughly 30 yards with the deer expiring after 25 yards. Roughly new to hunting, but was surprised i didn't drop him in his tracks. Both shots(two) were well placed in the shoulder, there was two small pencils holes with only one shot exiting. The bullets were 150 grain win power shock and i would like to upgrade to a better bullet. shots are in thick cover at close range, looking at win elite, and barnes perhaps, any suggestions?