I know I'm probably splitting hairs, but still looking for input. I'm wanting to build a rifle for deer and elk hunting that will reach out to 800 yds. but still come in under 9 pounds. Thinking about the 7WSM shooting 160 grain Accubonds or either of the 300's shooting 180 grain Accubonds. From the research I've done, they are all pretty close. Is there an advantage to the heavier, larger frontal diameter of the 30 cal.? Also, in my research, I've been reading that it would be better to go with a case that doesn't have a belt. Why? Please help!! Like I said, I know they all will probably all suffice, but when I'm looking at spending a couple thousand dollars, I want the best. So any and all input would be greatly appreciated.