As I mentioned in the title I made a dumb mistake being new to traditional and not realizing how much weaker the spine needs to be than a compound and how much a carbon shaft stiffens when you cut it down. For a really old 47 pound at 27 inch ben pearson bushmaster I bought some gold tip traditional .400 spine arrows and cut them to 29 inches. Will these be too stiff now even with lots of point weight. With 100 grain heads they weigh right at 400 grains. With 300 grains up front these arrows would weigh 600 grains which I would be okay with, but I wouldn't wanna go much heavier than that. Would 300 grains up front get me in the ballpark?