Gene. I started with Winchester 115 gr. Silvertips and have never had a problem of any kind. I have had my R9 since March '09 and stocked up on the Silvertips before they became scarce and recently found 12 more boxes.
I have enough now that I probably won't ever have to get any more as I shoot the R9 very little. Performance is great.
I did get some Gold Dots 115 gr. as they were recommended here on the Forum, also, when I got the R9. Never have tried them, due to the great performance of the Silvertips, just keeping them for backup.
Some here like Golden Sabres 147 gr. and have had good results. I also bought 2 boxes of these, but again, haven't tried them.
The best advice I can give is when you find what your R9 likes best, stick to it. It just so happened, I didn't have to try anything else.