I have had great success with my 9.3 and a variety of good bullets. 250accubonds with 56.5 grains of varget, is very accurate. I have Lapua, Norma, and Hornady brass. I use the same load in all of them. I love lapua brass, Norma has been great too. I have not had great success with the hornady brass. I have had a couple not go off out of a box of 50pcs of new brass. One while deer hunting. Luckily the deer was just far enough away, that I quietly got a new round in and then game over for the deer. Checking the non-firing round later, and the shoulder was set way back on both rounds which caused excessive headspace. This was on new brass. The other round was same way, found it checking shoulder on rest of the rounds. That’s my only explanation for it. I immediately started hunting with lapua and Norma brass. I had used hornady hunting in case I loose them in the woods I don’t get too bothered by it. I am slowly using up the rest of hornady just practicing at range. Until it’s all once fired I won’t hunt with it again
I just started playing with the 286 grain bullets, and I have been using varget and RL15. My gun dies way better accuracy wise with RL15 with heavier bullets. Good accuracy with aframes and partitions. Debating which bullet to use in Africa this summer. I plan on taking my 375h&h and 270 aframes for an Eland, maybe gemsbuck. Plan on using the 9.3 for everything else. I know it makes no sense, they are very close, but I like my 9.3, and it needs to go to Africa too.