Woodies helps needed

[DayTripper]

Arrow:
11/32 POC; 28.5"; spine 52lbs; 100 grains field tips; 410 grains total.
Bow: 45#@28 Great Plains Kiowa recurve
My draw: 27"

I installed 135 grains 2 blades broad head on a couple of them. Could not get them to flight straight. I tried to rotate the head to find the sweet spot without success. Here are my questions:

1-What do I need to do if I want to install 125 grains or anything heavier?

2- Can the existing spine handle anything heavier than 100 grains?

[Bjorn]

You could try building out the side plate.

[Orion]

I agree with Bjorn.  If your recurve is cut to center and you're shooting a fast flite string, your current arrows are on the weak side for your set up.  Will need to go to a stiffer shaft if you want to increase point weight.

On the other hand, are you certain you're mounting your broadheads straight?  Do you spin test them?  A crooked broadhead will cause erratic arrow flight.

[DayTripper]

Orion,
I did the spin test and they were on correctly. i was affaird that I will meed to go to a stiffer spine. Thanks for your help.

[DayTripper]

Orion,
I did the spin test and they were on correctly. i was affaird that I will meed to go to a stiffer spine. Thanks for your help.

[lpcjon2]

If you had the bow dialed in for those arrows with the 100 grn heads and then added 135 grn heads you will have to dial it in again. Yes they are a bit week, but if the flight shows them dropping try to adjust the nock point. 35gns difference will be noticeable in the arrow flight.

[Fletcher]

With a 27" draw and 28.5" arrow, you should be able to shorten the arrow by as much as 1 inch.  Anther thing to try would be to move the side plate out a bit.  Either should work if low spine is the issue.