The century arms 4 bore weighs 22 lbs. There are not many true 4 bores out there at a true 1.052 diameter. A lot of the old English 4 bores are really closer to a 5 or 6 bore and most have a diameter in the .980 to .990 range. The old 2 bores were really a true 4 bore back in the day. They are not practical, but you can learn to shoot them without them feeling like a punch in the head. With practice, proper fit and stock design, they are shootable. Most kick far less than a 700 nitro at 16 to 17 lbs. But they are not for everyone.