You may need full burn to get out to a 1000yds and beyond, but you stated yourself that your not even going past half of that. 16 “ barrels are proven to 700 yds and beyond. You can save tons of weight by getting a lighter profile than a bull barrel, which, now I need to ask why you want one in that profile? It’s heavy and offers little benefit in a hunting rifle or target rifle your using “shooting off the back deck”. If you aren’t a bench rest guy it won’t matter.
BTW, you may want to research Moriarti before you buy from them. I would recommend against it.