Re: 500yrd best bullet
Blood trail will not be a problem with the 185 ttsx Barnes . When it doubles its caliber on exit it will blow most of the lungs out the exit hole making a pretty big mess. I told you what I shoot in mine and that comes from a lot of experience. 3.5" high at 100 and you are point blank range to over 400 yards. A mil dot scope and 600 yards is trivial. The most power with the least recoil you will see in a 338 win mag. Excellent quality bullet you will not beat. There are many options but the 185 has the integrity, BC, velocity, pass through ability and flat trajectory to be about as good as you can do at your 500 yards with a 338 win mag.
The longest shot I have made on a moose with a 338 win mag was 1100 yards. You will have no problem at 500.
Predictions are difficult, especially when they involve the future