$800giving a bit more throat does have some speed upside but it's way less than most people think and or should be thinking. Generally (IMO) if one is adding length to a throat to get more speed then they're really working it hard to get it. Pretty much the same old thing as going AI.
I'm 63, I've been loading for centerfire for 51 years. My one and only one item on my wish list for us loaders is that some day we have available to us pressure measuring systems that are trust worthy and cost effective (IE sub 1K dollars).
I expect that when the day comes that we have pressure testing equipement at our disposal we'll all be learning some lessons. Kind of like back pre LRF everyone would routinely make 400 yard shots, then when good LRF's become common place people were routinely making 255 yard pokes...
I'd say build it, and let primer pocket life and speed be your guide.
But, please don't build a 7/08.............sorry couldn't resist.
have a great day all!
(last Q, Cody were you able to sort out anything with the goat tag you had or was it just a goat rope?)