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Bumping from a factory 26" barrel to a 30" on the edge, and switching to 300 gr smk pushed at 2850, down range energy is far superior. Now if you custom chamber a Lapua in a 30" tube, balistics will be similar, with velocities pushing uper 27s. Down side to the Lapua is cost of reloading in my book. The cost of brass is a huge difference, and Being good friends with the designer of the edge makes me feel better about having one as well.
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The Designer of the Edge is building my 338 Laupa as we speak.Expected velocity with 300 Grain SMK's is the same 2850 FPS. The intail building would have been cheaper to go with the EDGE,but I chose the Laupa because of the stronger and better quality brass (Not The Norma Made Laupa brass).The Laupa made brass can with stand higher pressures,than can the Edge Brass,so at the same pressure level the Laupa brass should last longer.Kirby Allen is makeing 300/338 Laupa Improved rifles for the very reason of the stronger cases.The Edge is easier to make feed and the only way that I am aware of tio make the Laupa feed reliabley is with a single stack magazine.Mine will be set up with for a loaded lenght of 3.9 inches and I am going with a 30" ABS barrel.......
Good luck to you with your build you can't go wrong either way IMHO.......
range it,check the wind, dial in correction, aim and only one shot