This is a discussion on Hollow Point BS? within the Defensive Ammunition & Ballistics forums, part of the Defensive Carry Discussions category; Bull Pucky!...
I don't think it matters if you use FMJ or hollow points (concerning the break in period). It will not (as far as I know) effect later use.
However, you might find some AKs have jams with hollow points that cycle fine with FMJ.
I have a cheap (At least before the panic) WASR 10/63. I shoot HP, soft point, FMJ - whatever I happen to grab from the old ammo can. Never had a problem.
That being said, the odd AK may have a problem with HPs. You just have to shoot it and find out.
There is no "break-in" necessary, per-se, other than making sure your particular specimen functions.
Some Century WASRs had difficulty feeding HP rounds because of improperly set bullet guides: AK-47 Parts : Parts4ak47.com: (about 1/2 way down)
It can be corrected by Dremelling an "M4" ramp at the chamber throat, generally.