Both the Finns & the Russians counterbored the muzzle to restore accuracy. The bore may even clean up a bit when you pass a cleaning rd through it. I also have a [SA] marked NEW M91. The rifle has real history - made in the USAicon, used by Russiaicon and then by the Finns against the Russians. Any import marks? If not, that add to its value. The Finns carefully rebuilt their rifles so it may be a good shooter despite the bore.

For $150, I'd take it. Please let us know how it turns out. Pictures, please!