35 Whelen is an awesome round and I can't wait to get everything together to build one myself. 338LM, regardless of what some other comments on here have said, is not wise to do on the standard 110 action. Due to the case diameter with the small shank barrel the chamber walls are too thin and will cause it to swell too much every time a round is fired leading to stuck cases etc., not to mention other safety issues. The larger diameter case head creates a lot more bolt thrust as well and is more than what the standard 110 action is designed to handle. You'll have locking lug set back issues. You can do a search on here for where Sharpshooter has talked pretty in depth about his testing on this.