I use a .308 for whitetail and load 180 Grain SST's. 180 works best out of my gun but I'm not happy with the penetration of the SST. Thinking about trying Barnes TTSX and heard you can drop down some weight using monolithic bullets. I know 180 for whitetail is overkill, but they shoot the best out of my gun. The farthest I can shoot where I hunt is 300 yards and it can get brushy here in Wisconsin at shorter shots which is why I like the heavier bullets. I can only find 180 TTSX right now so I can't compare. Since the farthest is only 300 yds. and I'll be punching brush from time to time, is the 180 a good pick, or should I drop down to the 168? I know, I know, whatever shoots best. Just wondering if it's overkill and since I have no experience with monolithic bullets, I'm looking for some insight, maybe some pro's and con's. Been hunting deer for 47 years, but only started using a rifle recently.