I go the other way, especially w/ high pressure rounds. Use the 200gr data & work back up. The 5gr diff wt probably doesn't make a lot of diff if you are running off the top end loads, but w/ 800X I assume you want to push them a bit.
"Given adequate penetration, a larger diameter bullet will have an edge in wounding effectiveness. It will damage a blood vessel the smaller projectile barely misses. The larger permanent cavity may lead to faster blood loss. Although such an edge clearly exists, its significance cannot be quantified".