If you smooth it up too much and you could make the head space too short and you could get slamfires. The .22LR head spaces on the rim. If you are not familiar with machinist work, I would say that you should not attempt to do the job yourself. Call Ruger and tell them about it.
SCHEMATIC AND EXPLAINATION
Scroll down the the ralfus reply on headspace and you'll see what I am talking about. Also, I have heard that .0425" is the absolute minimum for headspace, especially on semiautos where there is more wear on the bolt face.
PAY PARTICULAR ATTENTION TO JIM KEENAN'S REPLY(SLAMFIRES) ON 22 SEMIAUTOS BELOW RALFUS'S POST.