Arrow question

[Richie]

I have been shooting a 28" 3555 gt. with 150 gr. insert and a 125 gr. tip with my montana l/b which is 55#s and my draw length is 27".I shoot pretty decent with these arrows but I'm looking for a heavier arrow. Stu's spine calculator shows that a 29" 5575 gt. or a 30.5" 7595 with the same weight that I'm currently using should be just right. The 5575 gives me 10.3 gpp , the 7595 would give me 10.9 gpp where the 3555's are 9.7 gpp. I really want to shoot a heavier arrow and I like the gt.s ,would this be the way to go? Suggestions please.

[JimB]

It wouldn't be a bad way to go as long as those numbers are accurate.The calculator usually is but comparing setups I have,it was very accurate on the lower FOC arrows but on the real heavy FOC ones,I needed way more point weight than it recommended.

I shoot some 30" 7595's out of bows 52-55#s at my draw length.It takes about 400 grs of point and insert weight to tune them.This makes a 700 gr arrow,app 13 gpp.30.5" would require slightly less,maybe 10-20 grs but I doubt more.

The 5575's may be closer but I wouldn't be too quick to cut.If you want to keep a 10 0r 11 gpp arrow.I would start longer than the calculator recommends and gradually trim them down till you get good flight with whatever point weight you want to use.

How do you get 150 gr inserts? Good luck with it.

[dave19113]

I always found with the stu cal, it is a good starting point but, for me anyway it is off on velocity. According to it my arrows that shoot best are always underspined. I am big on FOC. GT3555 with 275 up front


Good luck

[Richie]

I use 3-50 gr. gt. inserts