I'll be hunting whitetails in coastal Louisiana marshes. 400-500 yard shots are not uncommon, with 600 yards being max visibility. This rifle will be used for 2 weeks out of the season, once rifle season kicks in I'll be back on the .280 AI. Our primitive weapon regulations have just been busted wide open this year and I'm planning a build for next year to upgrade from my .35 Whelen. Here are the 3 requirements... 1. must be breech loaded 2. must have an exposed hammer 3. must be .35 caliber or larger. With that said, I'm leaning towards a TC Encore Pro Hunter platform and having a custom barrel built for it. Right now I'm liking the .358 Norma, but am also intrigued by the .358 UMT. What are your thoughts? What would you build given the 3 requirements stated?