Here's a little ancient history that might help you decide how light a rifle ought to be. When their bolt action rifle was not accepted to replace the Krag, Savage shortened it up till it just acommidated their .250 Savage cartridge. Depending on the weight of the stock it ran a bit over 6 lbs. The post war shooter greeted it with shouts of joy, but petitioned Savage for a bigger cartridge. They wanted a .30-05 by golly. Well Savage invented the .300 Savage, which fit their nifty Model 20, and put it on the market. It looked at first as if they had a winner. Sales slowed, however as the word got around, the danged thing kicked to hard. Savage increased the diameter of the barrel and added more wood to the stock, until a 7+ pound riflle was available. Sales continued to lag however and the Stock Market crash of '29 put this light rifle out of business. Nowdays there are muzzle breaks that deafen bystanders or effective recoil absorbers of various types, So you can get away with heavier recoil than in the old days, but there aren't that many cartridges over .30 caliber that are setting sales records, despite the hype in the gun rags.