Where did you get that bit of info? It sure doesn't come from the Chuck Hawks site you linked to. They only list 8.5 lb rifles when talking about .300 Winmag recoil. In fact I consulted that very table before I made my post just to make sure. And if you think there's just a 8 lb. difference in recoil between a 8.5 lb rifle and a 6.5 lb. rifle I can only say that certainly hasn't been my experience. Others mention shotguns and their recoil. Let's talk about this post:
Have you ever fired one of those slugs in a 6 lb. H&R single shot, breakdown shotgun? It will kick like a mule. I shot 3 Brenneke slugs (not much different than those Winchester slugs mentioned here) in a Topper once. I got a bruise that lasted a month. And I don't bruise easily at all. Put the same round in a 870, which weighs about 7.5 lbs. and the recoil drops drastically. Weight makes a huge difference when it comes to felt recoil.
There is a huge difference in shooting a powerful round in a 8.5 lb. rifle and a 6.5 lb. rifle like the Tikka T3 Lite. A HUGE difference.
Since you brought Hawks into this let's look at another of his pages. It's here:
http://www.chuckhawks.com/rifle_weight.htm
You will find this information on that page:
"Rifles for cartridges such as the .257 Weatherby Magnum, .264 Winchester Magnum, .270 Weatherby Magnum, 7mm Remington Magnum, 7mm STW, 7mm Weatherby Magnum, 7mm Ultra Mag, .300 SAUM, .300 WSM, .300 H&H Magnum, .308 Norma Magnum, .300 Winchester Magnum, .338-06, .35 Whelen, .350 Remington Magnum, 9.3x74R, and .444 Marlin should not be lighter than 8.5 pounds or heavier than about 9.5 pounds."
That's a full 2 pounds more than the T3 Lite. And what does Hawks think a 6.5 lb. rifle should cover? Read this:
".22 centerfire rifles intended for small game and predator hunting, as well as rifles chambered for light military cartridges such as the .223, .30 Carbine and 7.62x39 used for the same purposes, should ideally weigh between 6.5 and 7.5 pounds.. Rifles chambered for revolver cartridges such as .32-20, .357 Magnum, .44-40, and .45 Colt are also well suited for rifles weighing 6.5 to 7.5 pounds."
If you want to quote Hawks let's get it right. Again there's no listing for a 6.5 lb. rifle shooting .300 Winmag ammo. The only listings are for 8.5 lbs.. And the maximum rifle round for a 6.5 lb. rifle like the T3 should be no more than a .45 Long Colt. There's a whopping difference between that round and a .300 Winmag.