RE: New to ML is this a good load to start with?
That would be an excellent place to start and a good projectile. If that one does not work for you try a simple 240 or 300 grain Hornady XTP but I have better luck with them in the .430 diameter then the .452 diameter although you would not want to live on the difference.
That's a great rifle. I am sure you will be pleased with it. Keep us posted.