I've got a Ruger M77, chambered in .300 Winmag, southpaw. I'm wanting to replace the 24 inch barrel, replace the trigger, and put a recoil pad on it. I'm wanting to make it a 1,000 yd. tack driver. My question is, how long of a barrel would you recommend? I'm thinking 26 inches or greater. Any suggestions? Thanks.......