Hey Gang,

I know the gpi is different on these two arrows but are they spined the same?

Thanks and Happy Hunting

350s are stiffer

250's are spined 0.373"
350's are spined 0.320"

Thanks guys!

I have found with my bows that if I take a 175 grain tip or broadhead on a shaft cut at 29 inches for both 250 and 350's, I use the stock aluminum insert for the 250's and a 100gr. brass insert for the 350's they fly just about right for both. 250's about 570 gr and 350's about 670gr. With my 61#@28" bows I'm pretty happy. I probably draw slightly less than 28", I havn't rechecked my draw length lately or since I changed my anchor awhile ago. I also use the 150's with a 100 gr tip when I want bullet like speed! This is why I like the Heritage shafts, so much versatility, same components. When I go down to 55-56# bows I add 225-250gr tips  and my arrow weight increases to about 740gr with the 350's and a 100gr. less with the 250's.

I love the CX Heritage. My bows are in the mid 50# range. My draw is 30". I use he 250's. Have one 40ish bow use 150. and my 64# longbow 350's.
If you are tuning for your Hoots there are a lot of people who tune 150's with "dart" like flights.

3rivers sells a test kit.