My 280 is also a Browning Composite Stalker. Great gun, great cartridge. Don' t sell the 280 short. It may be a step down from your 300 but not a big step. Not much differance in recoil between my 280 and 270.

My experiance is fairly limited to a few deer but I can find nothing wrong with it. It seems to hit a little harder on deer than my 270 but that could have just been do to shot placement. I' ve killed a lot more deer with the 270 than the 280.

My 280 is a little finicky about ammo but shoots the Winchester Ballistic Silvertips great. I think you' ll be very pleased with yours.