I've been giving this a little thought for the past week. First, how feasible do you suppose it would be to make a long barreled bolt action rifle in a pistol cartridge like .45 ACP, then work up a handload using a heavy bullet and a fast burning powder to achieve around 700 fps at the muzzle? I imagine it probably could be done using a short action rifle and rebarrelling it. Second, for those of you who have experimented with reduced power loads, how quiet is it possible to get without a suppressor? Obviously .22 Aguila rounds can be very quiet indeed, but how about a 300 grain .45 bullet traveling at a respectable velocity? Can it be done or would it just be a waste of time and money?