I recently built a 6.5x47L similar to what you're looking at building. I used a HS precision mountain rifle stock like the one posted above and a 22" barrel in a Remington magnum profile and a brake. With a zeiss 6.5-20x50, I came in around 8lbs and seems pretty well balanced. I carried it for a week on a recent hunt and was happy with it. Easy enough to carry most times and performed well on game. The only thing I might change is getting rid of the brake and cutting it back to 20". The brake liked to get snagged when busting brush.