I spend a lot of time hunting with my .300, hunting everything from small African antelopes to red stag, kudu and eland. I use exclusively Swift A-frame and Barnes. Depending on animal size/species I use 150–180 grain bullets. I have a Leupold scope with CDS set with 165 gr Barnes. With lots of range time I can switch from 150, 165, 180 Barnes or Swift and know I’ll be fine out to 400+ yards. I love 180 gr. Swift on heavy animals as it rarely penetrates the off shoulder and ends up about the size of a quarter just under the skin. Go to their website and watch the clip on how it is supposed to work. Last year took an eland (around 1700#) with one shot at 375 yards. It stood there for a moment and then toppled over. The bullet could be felt just under the skin. I stopped reloading after 50+ years because factory ammo got so good. Started when I was 12 and will be 72 this year. Good luck!Looking for a good shooting factory load for a Remington sendero 300 win mag. 75% of the time it will be used for whitetail hunting inside 400 yards. So far I have shot hornady 200gn eldx precision hunter, these group around 1.25-1.5” at 100 yards. I also tried some 180 sst superformance ammo I had laying around. These shot a 1” group but I have had over expansion issues in the past with these. I would like to stay in the 180-200gn range as I also like to practice at some longer distances for fun. Just looking for what may work well for others.