I will be ordering a 577 nitro next week . I want the double to come in at 11-12 pounds. Ive been told that this can be done by shortening the barrel by one inch(from 26-25 inch). My question to you pros? is there a reason not to go to 24 inches? I'm new to doubles. I understand the rifle will be regulated to 50 yards anyway. What sizes barrels do you all have ..thanks steve