bought some carbon arrows on sale, they were carbon express, 50 to 60lbs, the two bows I shoot are both longbows with fastflight strings. The little bow is 57 to 60lbs the other one is 68lbs, I put 100 grn brass inserts with 145 grn head. The 60lb bow shoots these really good, then if I switch to 125 grn the 70 lb shoots them good, the arrows are cut to 29 inches, Question for you is it safe to shoot these out of the 70lb bow where there rated lower I got the weight to 580 grn. PS I bare shafted both bows with the different point weights they both are straight in the target but both bows come in slightly tail high. These are the first carbons I have ever bought so any advise is good