New bbl break in for 223 112 Sav.

[JWFilips]

Back in the 80's I shot light & heavy bench rest....I may be missing some thing here but I never recall breaking in a barrel! I did fire 5 shot strings & clean between each ( every time...but that was jacketed) Groups right off the bat for each rifle were 1 MOA from a new bore! and tightened up by 100 rounds.
I think a lot has to do with the barrel maker. But from what I have found is a good barrel will shoot first shot or 100 shot very well if you do your part

 

[KHornet]

The last bbl on this rifle had an estimated 6000 rds thru it (give or take a couple
hundred rounds). Shot MOA pretty much beyond 4000, then would stay under
two for another thousand or so. That was a heavy bbl factory savage.

Paul