Dude this is a complicated one.
From the Florida fish and wildlife conservation commision. (DFG)

log(weight, in grams) = -4.83 + 1.923 x log(total length, in mm) + 1.157 x log(girth, in mm)

The Florida formula would put Perry's WRB at almost 27 lbs.

Using the formula (L*G*G)/800 Perry's fish calculates to over 33 lbs. This one is generally used for trout/salmon shaped fish and does ok for those.

(G*G*L)/1200 is another widely used formula and is better for bass shaped fish. Perry's bass would calc to 25 lbs. using this one.

The IGFA uses (LxGxG)/914. Perry's record calcs to over 28 lbs.

The formula Terry posted here for the In Fisherman puts Perry's fish at around 21.5 if I remember my math right. Closest so far.

No formula will be exactly accurate. As you can see there can be a fairly large discrepency depending on which one you use.

I also calculated a few other well documented big fish and the results are all over the place.

The results from using differnt formulas for Jed Dickersons Lake Dixon bass go like this.

Weight = 21.69 lbs. L = 28", G = 26.75"

(G*G*L)/1200 = 17.48
(L*G*G)/800 = 25.04
(LxGxG)/914 = 21.92
FLA = 18.82
Terry's formula = 18.47

I hope I did those right :7

MT