I acquired a 12 bore British hammergun that is just over 8 lbs. The balance point is about 5 1/2 inches in front of the front trigger which in my mind makes it feel even heavier than it is. I considered adding some weight to the butt and used some masking tape to do so experimentally just to get an idea of the difference in feel. I added about 8 ounces which moved the balance back about an inch and it did make the gun "feel" lighter even though I added weight to it. Then I did some reading and the opinion was that adding weight to either end of a gun to change balance is the worst place to put it because of the MOI. I am curious about how people are putting the information regarding MOI to use. How does changing the balancing point on a gun, in this case moving it back while also adding weight, change the MOI?
