It's an old bolt action mossy. So, I'm interested in maybe using it on deer this year, and what load might be best. There's all kinds of stuff about slug vs full choke on the interwebz. So, I'm asking. I hunt in areas without a lot of long shots. Distance is 0-100 meters. I'm a good shot. No optics. Just factory sights. #4 buck, 00 buck, slugs? What's the theoretically best load for the gun's limitations?