FMJ Dilema

[Straight6]

Ok, so I'm getting ready to buy new arrows for this fall. I have been shooting Easton FMJ's 400's for a few years now and like them a lot but I want to switch to 340's. My question is, is it worth the money to move up to the Injexion FMJ's? I like the small diameter, but then I will be replacing all my broadheads to work with the deep six inserts. Also, I have heard reports of some guys having problems with the Injexions mushrooming on the front of the shaft especially with a hard impact, has anyone experienced this? I would hate to spend the money and then have an arrow ruined by mushrooming out on the end.

 

[charvey9]

What is the reason for the switch from 400 to 340 spine?

Haven't had any problems with my FMJ injexions.

 

[Jeff Martin]

Did the GIF drop in to say hi I know the feeling...

 

[Straight6]

I have always shot a stiff spine up until a couple years ago when I tried the 400's. By stiff spine I mean I have always gone one size to the stiff side of whatever the charts suggested. I am one of the guys that believes that you cant go too stiff on shaft deflection, so its just personal preference. I know others see it differently, and to each his own. I have been shooting 430 grain arrows, but I'm trying to push it up closer to 500 grains this year. And yes, it seems the GIF set up shop in my basement, she might as well stay a while! What fun would archery be if you couldn't tinker with stuff!

 

[jmez]

I've shot and still shoot both. I haven't seen any material difference between the two. IMO there aren't any advantages to the smaller diameter shaft.

 

[charvey9]

One of the reasons I switched to the FMJ injexions is the slightly stiffer spine (330) over the FMJ (340) at just a hair less weight. So essentially you are getting more spine without sacrificing any speed. Finished arrow for me is 456gr and about perfect IMO.

I shoot a lot, and have never seen any mushrooming. My guess is that if you shot a tree, rock, or something else you weren't supposed to it could happen just like with any arrow. Or possibly if you used the wrong epoxy for the inserts or did not let it cure long enough. Last fall I shot a big black bear with that arrow that was 3/4 away. After passing through both lungs it smashed into his left front leg, and the bone snapped in half. Never seen anything like it, and I was sold on the arrow for sure.

 

[kodiakfly]

I've been fine with the FMJ's and haven't seen a need to go Injexions, plus I don't feel like buying new broadheads. And if you're trying to get your weight up, might as well go with the heavier of the two options.

 

[Straight6]

Thanks for the input, I'm leaning towards staying with the originals for now so I don't have to replace all my broadheads this year. I'm liking the slick tricks I'm shooting now, just weighing my options for arrows.

 

[Jacob Chapman]

I've shot the regular FMJ'S before, haven't had a chance to play w/the injexions yet.

Best way to avoid mushrooming the tip is to use jb weld on the insert. Problem solved.

Far as having to buy new broadheads, I would skip the deep 6 insert all together and just use the Firenock Aeroutserts. When installed properly they spin perfectly and are tough.

Could go w/the new Victory Penetrator 2 outserts as well if they will mount flush.

I definitely think there's advantages to the smaller diameter arrows but that's just me.

 

[Trial153]

The best answer to prevent mushrooming is to use a footing. I used to make all my footings however now I use the premade sleeves from VPA, they have a flange to protect the front of the shaft. They are held in place by your broad head or you can epoxy them. They are the best I seen yet.
I avoid all things outsert or half outs. I have used BEA half outs, fire nock half outs and also fire nock outserts they all will have misalignment after lateral force to the outsert is applied.