hey, new here, starting the search for a left hand, magnum cal gun that will be the basis for my build. the gun will have a 26" sporter weight barrel in .264 Win mag (probably a McGowen). one question I had is that I see that at least for the DBM's Savage uses 3 different mags, (long standards), (6.5x284, 7mag and 338mag) and one just for 300 win mag. given that the .264 is the same length as the 7 and 338, would there be any issues or extra work if my donor rifle is a 300win? does the same hold true for a hinged floor plate gun? also since I will have the thing torn down I will be doing some enhancements, bedding the action and lapping the lugs. would an aftermarket trued recoil lug and trued barrel nut be worth doing on a hunting rifle? also any tips on other cheap tricks I can do in the process that may be worth while?