Re: anyone build a 338 LM on a Number 1??
Very easily doable. I have 338-378's, a lapua and 416 off the #1. Makes a nice light and short rifle. Search the internet for fixes on trigger, bedding and accuracy. They like to vertical string but that can be fixed with bedding and torque on the forend bolt. You will need the 416 ejector from Ruger and take a few thousanths off where the case ejects.
Predictions are difficult, especially when they involve the future