Barrels are a problem to find , you can order one from some of the big name barrel makers , but be prepared to wait over a year or some times more , from what I've been reading . Its funny to read some of the posts about what people think of this caliber , much like the 300BLK from a while back .They say there are calibers out there that will do everything the 338 Fed. will do , but from ballistics' , that's not entirely true . Its not a 1K cartridge & was never meant to be , its for putting a big hunk of lead into a something at normal hunting ranges , much more than the 308 . The 308 can shoot flatter at distance , but put a lighter wt. bullet in the 338 Fed. & it will pump it out there also, from what I have read.
The whole thing as far as I'm concerned is a hunting cartridge & unless your a long range hunter , 3-400 yards with a 200-225 gr. bullet has shown to be very efficient knock down power.
Some were saying the 45-70 can do the same , well I have a 45-70 & its a great cartridge in its own right , but I would not compare them that way.
I guess I have to slow down on other projects just to see if this is feasible . The cost will be the only thing & I already have the upper & lower & BCG , so it may not be that bad .It has to be light , for carry in various terrain .
So if I can make it light weight for humping in the woods , I will go for it , but its going to be a 10# beast , its not going to happen.