I'm not sure why this works as well as it does but I use 2 different set ups and they both work very well out of a multitude of bows and draw weights. 1st, set up is a goldtip 3555 either black shaft or the traditional,(traditional weighs in about 30 grains heavier) it is full length (30 inches) and a 100 grain brass insert and a 175 grain tip, this set up spines out on Stu's calc. at jsut over 32 lbs BUT it flys better than great out of longbows and recurve up to 62lbs, ??? the total arrow weight is 540 grains and the foc is 21%,,,,,,,,,,,,,,,,,,,,,
the 2nd set up is a carbon express heritage 150 cut to 30 inches and as above with the 100 grain brass insert and 175 grain tip, also with same results, this set up is a bit heavier at 620 grains, and spines out on stu's calc. at just over 37 lbs,,, paper tunes a bullet hole with several different draw weights as I said up to 62 lbs and down to 49 lbs, don't ask me to explain ???