You can download a reloading guide from the VihtaVuori web site, it has loads for 147 gr and N320. I think you can probably pick up the guide at Profire's store in Indianapolis,IN. www.lapua.com is the website for VihtaVuori powder.
Have you tried any of the Montana Gold Bullets? I use the 124CMJ in my open gun and the 147CMJ for production. I have tried others including the plated and coated stuff but I don't get the accuracy I get from the MG. I haven't tried them but I have heard from what I consider a reliable source that the HP Montana Gold is more accurate then the CMJ. The CMJ's work for me so that is what I am sticking with. I have excellent results from Titegroup and WST in my 9mm loads.
HTH
Chris
I have tried 124gr and 147gr for production and I like the softer recoil impulse of the 147gr. I use a X-5 in production so what works best depends a lot on the gun and individual shooter preferences. I haven't tried my 147gr load in my G-17 yet, I have found that what works well in one gun doesn't always work well in another. Especially with guns that are as different as a X-5 and G-17.