Got off the phone with Tony at Talon Tunes, super nice guy, Ordered the 600mm Panthera in .30 with rear bottle and additional 700 cc front bottle. i will be using slugs and some heavy hunting pellets, Guess now I will search for what guys are using or finding out about this rifle. Meanwhile this weekend I will be tuning and trying various projectiles for my recently received from Brian at Ed Gun West, their version of the Sidewinder Compact in .30 They call it the Sidewinder Compact Pro or Snakelet Pro, , and comes with a 350cc 300bar CF bottle and a quick lug detachable Behemoth moderator. Its very quiet, not the case with the Behemoth detached lol, but very quiet when attached......a lot of power (96ft lbs in .30) in a short compact package, It makes waiting for the Panthera not so bad....lol.