I don't think that cutting the barrel down on your 280 is that bad of an idea. I have two carbines, a 760 in 308 Win, and a 7600 in 35 Rem. The thing that I like about the shorter barrels is that to me, the balance of the rifle feels better. Trying to compare my calibers to a 280 is tough to do, but I can say that I don't feel that my rifles are that much louder than a standard length barrel. At the range I am wearing ear protection, so more noise is hard to tell. When I or many others are hunting, 1 or 2 shots is all you usually get. At that point I haven't noticed any difference. Usually I get focused on the animal and forget about the noise. I would go on a limb a say that shooting a ported barrel or say a Browning Bar with the Boss on it would be louder. I know a person who shoots a Bar w/ the Boss and when he shoots, you can definently tell. A friend that I hunt with shoots a Winchester 100 carbine in 308 and I have been close to him when he has shot and have not noticed the rifle to be ant louder then normal. I have a friend who chopped the barrel on a 760 in 300 Savage and he has not noticed any big difference in the amount of noise. As far as accuracy, I don't think the shorter barrels lack anything. Both of my carbines shoot great and I had a Ruger compact rifle (16" barrel) in 243 that shot unbelievable. The one thing that I have noticed is that, if you decide to shorten a rifle barrel, make sure you plan on keeping the rifle. In central WI, many people turn their noses up at pumps to begin with, then if you tell them that you "customized" one, then they get real skeptical. If your area is not like this, then you are ok. Sounds like a cool project to me, and if it works for the Benoit's, it works for me.