As far as a single shot versus repeater, for most of us we are not good enough to tell the difference in accuracy between the two and for hunting it seldom comes down to that kind of hair splitting.
Mostly it depends on your personality and what you are hunting and how you are hunting. For a dedicated long range rifle that will not be used in thick brush and dense cover and against large dangerous animls, there is no disadvantage to the single shot. At distances past 800 yards or so, if you miss the first shot then there is no reason to rack another round in the chamber until you have figured out what went wrong with the first shot and can make a good adjustment.
For a multiuse rifle then you might want a reapeater although a lot of us hunt with Ruger #1, and other types of single shots even in thick cover. Personally, I find that the thought that there is only going to be one shot somewhat calming even though it sometimes means I will pass on a marginal shot waiting for one that is better and it gets no better and the animals gets away which may have been the best thing anyway if the shot was so marginal that I thought I would need a second shot.
It is just mostly personality and I happen to like the single shot rifles. So I would suggest that you do as you please unless you are planning on hunting really dangerous animals with a guide where your actions may endanger him.
I dont eject the brass after the shot anymore, you dont lose it that way!.
That right. Even when I miss, I will just lay there swearing and cussing at myself.