[FRITZ1015]

I just found this forum and I'm thrilled there are other people out there who love the 989M2!! I have a pretty much mint one from my uncle, hardly used by him, sat for a long time and now I aquired it. I threw a new scope on it and while sighting it in I had alot of FTF's (I dont think any FTE). My uncle said he never did a full take down cleaning so I did it the other day.
Everything was somewhat dirty as expected but I cleaned and lubed everything.
A few questions for you experts though:
1) What brand/weight of ammo do you recommend for this rifle?
2) My plastic buffer is broke in 2 pcs, I found a new one on brownells/midway, but what does that buffer even do functionally?
3) Mine is old, not sure what yr but early for sure. I know if doesnt have the LSHO but even the old manual says that if you push the bolt in toward the receiver while pulled back it will lock in open. Mine does not do this at all...is something broke inside or do the early ones not even have this feature?
Sorry for the long post just some stuff I've been dying to find someone to ask.

Thanks.