how about just learn to stalk closer and save all that powder- the difference using 180s in mpbr is 267 for the 308, 276 for the 06 and 325 for the 300 win mag, so you're paying an awful lot for 50 yards range- the way us old fellers see the difference is like this- 180 and under, 308 - it's a more efficient case and the 180 is as heavy as you can go without sitting the bullet IN THE POWDER- ie a compressed load- now there are ways round this- a 308 on an 06 action- this would allow you to seat the bullets longer , but you begin to run out of cartridge length- might as well use an 06 and take advantage of the longer case -and if you want to step up to 200 grains or more you can- if you want to step up to the 300, you might as well go to the 338 win mag and REALLY put the hurt on them