Am looking at a side by side Chapuis 9.3x74R, very long 16" pull, must have been made for a giant. I would have to cut it to 14" or even 13 3/4". Will this alter the regulation?

It shouldn't affect regulation. It will affect balance which may alter the 'way' it shoots. Which might not be a bad thing.

It's doubtful that it will affect your regulation. You most likely have a knowledge of this fact but I thought I would put my 2 cents in. Your length of pull on a double will as a rule be longer than a bolt gun. My length of pull on a bolt gun is 14.25 inches while my doubles are 14.75 inches, so you might not have to remove as much as you think. Make sure you get checked out by a good gunsmith that knows doubles before you start hacking away.

Decided in the end not to bid on it - London auction - because taking two inches off the back will make the buttplate too small.

quote:

vigillinus

I would see if you can get it for a good price. Most people add a good recoil pad so cutting isn't a issue. I would get fitted by some one who knows how to fit you to a double rifle.
Bill