Playing around with arrows

I am shooting a 2014 Hoyt charger, 27.5 in draw, 65# with 400 spin FMJ cut at 27.5" with 100 grain points. If I move up to 70 pounds should I get some 340 spine arrows? Also I want a heavier arrow to carry more weight and more KE. What should I do as far as adding weight?

 

Tried downloading the pinwheel software for archers but I couldn't get it to work..

 

those 400's are boarder line at 65#... 70 use the 340's for sure

 

Definitely go to a 340 spine arrow

 

Definitely go with 340. You can move to a heavier GPI arrow or add tip weight.


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I'm shooting some 400 FMJ's off a 70 lb draw wt bow. Never had any problems and arrows fly well. Thing to remember, an FMJ is a composite shaft in that there are two different media making up the shaft, one carbon and one metal. The shaft is not "homogenous" so will behave differently. Total weight is what I considered when getting some FMJ's. The 400's weighed pretty much the same as the 340 Axis/Nightfall's I also use. If you want a heavier arrow, then go with the 340 to get there. The 400's would also fly very well with a heavier tip. If the 340 is one extra grain per inch more in weight, at 27", that's adding 27 grains. A 125 gr tip would do the same.

Camofire had a smoking deal on the FMJ's which is why I got them.

 

^THIS^

 

The problem with this is the 125 grain point weakens the spine even more. So a 70# bow with a 400 spine and 125 grain tip would be much too weak in my opinion.

 

Would adding 25 grains to a 400 spine make it less effective? On the spine chart it says 400 would be fine for my specs at 70 pounds if I use a 100 grain point but to move up to a 340 spine if I go with 125 grains.
My local shop here sells them $9/arrow which is why I started using them. $1 more if you want them to put your wraps and custom fletching + cost of vanes

 

Thats what I was thinking

 

I thought that arrow charts used the same tip weight of 100 grs? Now that I think of it, when I shot 400's, I shot 65 lb draw weight. The only 400 spine arrows I've been shooting off my 70 lb rig(s) are the FMJ's with 100 gr weight tips, so yeah, you guys are right...never mind :p

 

I was talking to the guy at the shop and he has the same draw length as me and he shoots 400 spine at 70 pounds. I moved my bow to 70 and I'm going to stick with 400 spine/ 100 tips until I can afford to play around some more with different arrows and tips.

And easton has a thing at the bottom of their page where you enter your specs and it recommend shafts for you