help with arrow selection

Hi all, looking to maybe switch up arrows here. I'm currently shooting a Mathews Creed 28" dl, 65 lbs dw and shooting Easton Powerflight .400 spine arrows cut to 28-28.5". I've been using mechanical heads lately and I'm not overly confident with their reliability(I want to be confident) so I'm looking at switching to a fixed blade G5 Montec(not CS). One fellow I've been talking to who has been around bowhunting for many many years said that I may want to switch to a .340 spine arrow if using fixed blades. Is this true? Also after seeing some lack of penetration with the mechanical heads I'm thinking of maybe going to a hight gpi arrow, should I be worrying about this given that I will be shooting a fixed blade instead of a mechanical? The arrows I'm looking at are Easton powerflights, FMJ and AXIS. What should I be doing differently or looking for when making the switch to fixed blades?

I've only been hunting with bow for a year now but have been shooting informal 3d for the last ten years. So now I'm just getting into some unfamiliar waters here and want to be able to make ethical kills. Thanks.

 

The axis arrows have my vote


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The spine of the powerflight at .400 will definitely not help penetrations on 28.5" arrow. I would definitely move to the .340 spine when looking at new arrows.
The easton axis is a great arrow that gives a good trade off between weight and speed. It's a very well manufactured arrow as well and won't break the bank. You won't be let down by that arrow at all.

 

If your shooting 100 grain heads your about borderline. Moving up to .340 wont hurt anything and may help with fixed blade broad head flight. Nothing wrong with the powerflights your using at all. However if your looking to up grade both the FMJ and Axis are both good shafts, beware that they both use HIT inserts on account of their smaller diameter,which are different then what your using now. Gold tip hunter xt and exp are good mid weight arrow that will serve you well, they use standard inserts and both come in .340 spine.

 

NO problems with mechanical head penetration and i'm only shootiog 58

 

I think I will be trying a half dozen to see how they work. I was actually playing around on the archery pall ap and was very surprised to see that with my current setup I was within 1-2 fp/e of the axis. I think my main focus will be spine instead of penetration.

Now with the HIT insert I know I need an adapter ring for broad heads but what about use of field points? I do plan on eventually switching to strictly shooting broad heads for practice, but in the interim I'd like to use field points.