How many rounds to break in a new Savage Model 10?

I'm working on breaking in my new Savage Model 10 Predator Hunter. Should it be shooting tight groups (1" @ 100y) right out of the box or should I be expecting variability in POI for "X" number of rounds? I have fired 30 rounds off benchrest and feel like I am chasing holes with turret clicks. Shot one nice tight group then tried to immediately duplicate and pattern seemed to move about an inch and spread.

Its a 243 so is about a buck a shot. Should I jut plan on buying a few more boxes of cheap stuff and not get too wound up during the first few boxes? Right now I'm playing that game where I keep asking Is it the scope? Is it the gun? Is it the cheap ammo? is it the benchrest? Is it me? Over and over and over.

If the barrel is free floated I would suspect the scope. Changing POI is a symptom of a bad scope. Try another one.

it also is a sighn of bad barrel i had a bad barrel from savage of coarse they replaced it, all of the areas you mentioned can be the problem, you, the rest , ammo, scope, scope base, start with rest make sure you have a really good rest get that gun in your shoulder nice an tight, if it is a small sporter type barrel rest way behind sling stud i had flexing with small frame type gun compaired to varmit, I found the Hornady 58GR V Max shot best in my model 16 in 243 win maybe you can find loaded ammo form hornady that has a 1-9.25 twist i think you do check twist if 1-9 no more then 80GR bulllet if slower twist like 1-12 then even lighter bullet.