my injexions used to group....

[winter]

Was wondering if anyone else has noticed any reduction in accuracy from their injexions over time? I got a bunch when they first came out. They shot awesome and I was impressed.... Same bow, same setup two years later, now they don't group. I played with everything I know and they just don't group. I'm thinking it's a spine consistency thing because they are still straight.

I grab my 8 year old acc's and whala!

Thoughts?

 

[OR Archer]

What kind of bow? When's the last time you had it tuned or put strings on it? What are the bow and arrow specs?

 

[OR Archer]

Also when is the last time you changed the nocks?

 

[chobbs]

I would 2nd or Archer and ask when the last strings or tune was on that Bow.

 

[Eagle]

I've noticed this same thing with other carbon shafts, it's the reason I switched to ACC arrows as well, the aluminum seems to do a much better job of maintaining spine over time. The bow I used when I noticed this was tuned, less than a year old and the nocks on the arrows had recently been replaced. I think a large part of the issue with the carbon arrows I used was I shot in a couple techno hunt tournaments/leagues, and I think the impact of the carbon arrows on the canvas with the blunt tips degraded the spine over time.

 

[Matt W.]

Also when is the last time you changed the nocks?

Can you explain more what you mean here? I'm new to archery and curious how often one should do this? Thanks.

 

[chenashot]

I would say its a tuning problem. Two years is a long time on a set of threads even if you don't shoot much. Things will stretch and creep. The injexions have very tight tolerances too. I doubt it's them. The question is, are the acc's that you shot even the same length, weight, and more importantly spine?

 

[winter]

thanks for the replies fellas. I assure you the bow is tuned. As far as strings go...a good set of strings should last two years no problem.

When I say "reduced accuracy", I should clarify that I'm being very particular here. I demand perfection at long ranges from my equipment. A baseball sized group at 40 yards is not acceptable if I'm shooting even half way decent. When these arrows were new they pounded at 70 yards. I still have some new ones that I never fletched up a few years ago, I guess the true test will be to make those up and see if they group. I don't want to get into the bow tuning side of it or if I can even shoot good enough to tell. I just wanted to know if anyone else has noticed anything as I have.

 

[MattB]

Have you checked for contact? I just cannot see the spine degrading on arrows in such a way as to cause that.

 

[tipsntails7]

No offense but if your shooting enough to shoot the spine out of your arrow you need to change your strings sooner then every 2 year.

Could the tips be mushroomed a bit because of the field tip and arrow intersection? I noticed this on a few axis shafts I shot for 3d a lot.

 

[OR Archer]

Can you explain more what you mean here? I'm new to archery and curious how often one should do this? Thanks.

Beyond the obvious of replacing cracked or broken nocks its always a good idea to replace them if the fit is starting to get loose or sloppy.

 

[OR Archer]

thanks for the replies fellas. I assure you the bow is tuned. As far as strings go...a good set of strings should last two years no problem.

A set of strings may last a couple of years but you have to remember the center serving is constantly changing. On a fresh center serving the Injexions may have shot much better than on what is now a worn down center serving thus resulting in a slight spread in your groups. Your ACC's just might have a better fit on that worn serving now versus the Injexions resulting in slightly better groups that you are experiences. Now this is just one possible reasoning. I highly doubt is has anything to do with spine consistency.

 

[5MilesBack]

What kind of insert/outsert are you using? All the outsert type inserts I've ever used have eventually caused a wobble in the arrow. I know there are some decent SS outserts these days, but I'd still look hard at that end of the arrow.

 

[Rolo]

Can you explain more what you mean here? I'm new to archery and curious how often one should do this? Thanks.

Beyond the obvious of replacing cracked or broken nocks its always a good idea to replace them if the fit is starting to get loose or sloppy.

I generally just replace them on somewhat of a 'schedule' that is related to how much I am shooting. Indoor arrows, the nocks get changed out on a monthly basis. Shooting 90 to 130 arrows a day. Hunting and OD target arrows get their nocks changed less frequently, because I am not shooting them as much as the indoor sticks. But, my actual hunting arrows (have a set that does not get routinely shopt for practice) all get new nocks before the season, and all get shot a few times.

The reality is that the nock is the only thing connecting the arrow to the bow and is a very important accessory. They will widen over time and use. Unless a person is running Beiters, they are also very inexpensive to replace on a regular basis.

For the OP, that's where I would start on the shafts themselves, especially if you are running the standard 'g' nocks. At hunting weights, they had a tendency to weaken some. Eastoin has a 'hd' g nock that they designed for the Injection series for that very purpose. Color selection sucks though.

If it's a bow issue, I'd definitely look at the 'tune' (synch/timing) and center serving. I'd also replace the harnessing.

 

[Matt W.]

Thank you for this info. I had no idea. What glue do you use to attach your nocks to make switching them out fairly simple? Hot glue ok?

 

[Eagle]

Thank you for this info. I had no idea. What glue do you use to attach your nocks to make switching them out fairly simple? Hot glue ok?

Most nocks don't require glue and are just press in. I'm honestly not aware of a normal nock that requires glue?

 

[Matt W.]

I have one on my new FMJs that fell out. It won't stay in, so I assumed it had to be glued. I'll just get some new ones then and see if it will press in. Good thing I didn't glue it! : )

 

[jmez]

You must have gotten a bad batch. First I've seen or heard of that type of issue.

 

[Matt W.]

You must have gotten a bad batch. First I've seen or heard of that type of issue.

Lucky me...

 

[jmez]

My response was to the OP.

The FMJ nock issue is common. You need to buy a couple dozen and have them on hand so you can switch them out.