I picked up a 300 RUM sendero this week. It has a vias break and had been shot a total of 14 times. Good friend of mine decided he'd stick with his STW. Originally he bought two boxes of Remington factory foder one in 150 scirocco and 180 scirocco. I shot them both yesterday at 100 and BOTH of them group in LESS than .600 in a factory offering. Our whitetails are on the small side over here (less than 200 pounds ave) and i have had problems with penciling through with the scirocco in my 6.5x.284. i moved to the 120 tsx with it. Do you guys have any load suggestions for me to with the 300 RUM. 45 dollars a box is not an option. I prefer to roll my own anyway. This thing has great potential. I want to be able to put them down from 100 to 1000. Was thinking maybe hornady sst or berger. I am open let me hear your suggestions.