I am in the process of building a rifle for my young boys to have as their first rifle. I have a Tikka action and sourced a tikka compact stock as a chasis just was too much at this time. I am going to build the rifle in 6cm and am in the process of finding a barrel for my smith to chamber and thread. I am going to cut the barrel to 18” and thread it for a Silencer Co Harvester Evo to sit on it once things all get approved. I am leaning towards a Bartlein in 3B mainly because I found one in stock. Will this fit the stock without much dremel work or do I need to go down to a 3 or 2B? Also any idea what that barrel will weight at 18”?