IMHO, there is no such thing. Balance is a personal preference.
In the early 80's I built a rifle for a friend that balanced on his left hand where it gripped the forestock. He hated it. The SOB sold it for a profit. Next I built him a rifle with a straight 15/16 th in. .50 cal. Green River. Loved it. At a Blue Mtn. shoot about 1983, he tied in the primitive shoot with all hits. The tiebreaker went on for awile until the rangemaster dangled a stick between the legs of a buffalo siluette at 100 yds. The other guy hit on the cardboard just above it. Missed by 2 in. My buddy hit it. Everyone on the range was watching the outcome. Roger Fisher will attest, I think, that Blue Mtn. is somewhat competitive. I got 4 rifle orders before I LEFT. Luck for sure but you had to get close. Another top shooter in our club shot a 15/16th .45 x 42 in. I'm not saying that muzzleheavy guns are better. BUT BALANCE IS A PERSONAL MATTER. I like a rifle balanced on my left had with a slight drag on the muzzle. Just me.
By the by, this guy sold this rifle, which he paid the exorbitant price of $2000 in 1983, for $4500 at Dixon's last year, after nearly 25 years of hard use. 34 deer taken. And one red squirrel in N.Y. Nothing left but the tail.
So much for "It's to pretty to take in the woods" It's just natural and honest age when half the makers are trying to duplicate it.