In all honesty,I could have killed every deer I've killed in the last 10 years except for one with my cheapest single barrel shotgun and either a slug or buckshot.

Most times we get way too hung up on stuff that don't matter.There's not one of us in 10,000 that will be shooting so far at a deer that a 300 win would kill it but a 243 wouldn't,and that guy is just showing out.LOL He could have and should have set up closer.