KEEP IN MIND: Chuck Hawk's picked his rifle weights counting on real world weights for different rifles. He totally missed the mark on most weights, however, since he seems to use "empty weights" for the rifles, rather than "gross vehicle weights" for them as they would be hunted - i.e. a 7.5lb 243rem rifle might weigh 9.5lbs by the time you add a scope and sling.
ALSO KEEP IN MIND: Even in the same model, a long action rifle generally weighs a half pound heavier than a short action model, due to the longer action. Magnum cartridges tend to weigh 1/4 to 1/2 pound heavier still - often driven by a heavier barrel. So it's not really fair to say that a Remington 700 ADL would weigh the same 7.5lbs for all cartridges in which it might be sold.
The not so simple answer is that you can readily calculate recoil velocity and energy of any rifle - but you do need to know the powder charge.
The OTHER not so simple answer is that you can EASILY CORRECT CHUCK'S TABLE for your own rifle weight. The same formulas below also work for figuring out what your rifle's recoil energy would be if you added or reduced weight.
Recoil velocity is directly proportionate to rifle weight - so if your rifle weight goes up 10%, the recoil velocity goes DOWN 10%. It's a pretty straight forward formula:
Your Rifles Recoil Velocity = Tables recoil velocity / (Your rifles weight/Tables rifle weight).
Recoil ENERGY is directly proportionate to rifle weight, but proportionate to the square of recoil velocity - so if your rifle weight goes up 10% and your velocity goes down 10% as in the case above, your recoil energy goes down 9.1% (which is 1/110%). The formula SOUNDS complicated, but it's really easy once you simplify - it actually ends up exactly the same!!
Your Rifles recoil Energy = Tables recoil energy / (your rifle weight/tables weight).
So Chuck has an 8lb 30-06 firing 165grn pills at 2900fps with 20.1ft.lbs. recoil energy and 12.7fps recoil velocity. If you want to know what that would feel like from a 7.5lb rifle - equal weight to say - the 243win rifle he used (7.5lb, 100grn @ 2960fps with 8.8ft.lbs. recoil energy and 8.7fps velocity):
12.7 / (7.5/8.0) = 13.54fps recoil velocity
20.1 / (7.5/8.0) = 21.44ft.lbs. recoil energy
BUT - again, a 30-06 will likely weigh 1/2lb heavier than a 243win anyway, so that calculation might represent a rifle weight that isn't real.