I have a Tikka in 2 3/4 shell length that I want to lengthen to 3". The gunsmith said he can do it easily but would lengthen the forceing cone at the same time, is it a good idea to lengthen the forceing cone? I have read it is good but I get my ammo from Nitro and they say never lenghten the cone. I would like to shoot a factory load in this gun for turkeys.

Thanks,
Jim