I have a weatherby vangaurd 300wm 26" 1:10 I'm wondering what kind of barrel life I can expect,it has about 500 rounds down it sofar,almost all have been nosler bt's 180,165's and 14 factory rounds from Winchester. normallyis shot off the bench and cooling time allowed after 4-6 shots. Also what barrel would you recommend when I do replace it..been looking at a krieger 29" 10 twist in heavy varmit contour. May also look in to muzle brake,any tips? Have a howa black hawk stock on the way.