Re: 200 yard 338 group
The only time I shoot at 100 is chrono shooting a ladder. I never shoot for a group under 200y. The long high bc bullets need that extra distance to 'go to sleep'. Hard to explain, but the bullet will leave the muzzle with some oscillation that the spin will overcome. Group doesn't get any smaller as you go further down range but the moa does. Sounds like you have a very good load going.
To hunt... or not to hunt...? What a stupid question.