Recently picked up a nice Chapuis 8x57rimmed double. It was regulated with a scope and the irons. I took it to the range and need to adjust the irons as it hits 4in high and 4 in left at 50. The scope also hits the same POI. The rifle is regulated VERY well with Norma ammo and I am happy with it as I have been looking for a small double for a while. My question for those with a scoped double is that I would like to change the scope from an entry level to a much better scope. The new scope weights 1 oz more, I don't see where changing the scope would cause any problems but all my experience with my other double have been with irons. So those with experience with a scope on a double have you changed out scopes and were there any gottcha's I need to look for? Looking to use it on nocturnal kritters (Small cats) next year. will take the 450/400 for bigger stuff.