Thank you, that makes a lot of sense!
BUT...here is where I am confused. McGowen says that their 7mm rem mag and 300 win mag have the large shank and that the 338 edge has the small shank size for the savage rifles...Savage Pre-Fit Barrels
I have had a couple Krieger and have done the same. cut rifled tubes dont need much break in time.I've built a couple Savage 338 Edge's since the last posts.
On the one I kept, I went against the grain with barrel break-in. I put a patch through it to make sure it was clean. Then I've just been shooting it.
I did all my load development with a dirty barrel.
Got about 50 rounds through it so far and it shoots great. When the groups open up I'll think about cleaning it.