Re: 17 hmr break in?
Ugh... the phrase "break in" is almost taboo around these parts LOL.
I shot a few rounds out of my Savage 93r17 and cleaned it just to push anything out of the barrel the first 5rd mag broke loose and haven't looked back since.
Just don't clean the shit out of 17hmr. They like to be fired dirty as the fouling helps with accuracy.
I used to clean the shit out of my Savages and noticed my accuracy suffered until about 15-20 rounds went through it. What a bitch to zero the rifle when accuracy is poor until it dirties up.
Also try different makes of ammo, and if you find one that kicks ass, buy as many in that lot as you can, as they do very lot to lot. My Savages like Hornady red tips but the lot I recently got is meh at best.
I used to line 7.62 brass (either x39 or x54r, whatever was on the ground at the public range) and shoot them off one by one at 50 yards.
17HMR rocks though, so good choice in a great round!!!