Irish Knots

2008 mathews drenalin
drop away rest
carbon express cx300 - slight helical 4" vanes
muzzy 125 three blade

with field points very good out to 50yds

add the broad heads and can't get past 20 without a violent "barrel roll" type effect on the arrow
beating up the Glendell buck real bad with broadhead issues

anyone give me place to start?

i have redone my inserts so that three blade matched vanes- did not do much of anything for me

Kanga

Sounds like your bow is out of tune.
Or your arrows are out of tune.

Paper tune it to see how the arrow is coming off the bow,then walk back tune. There is a sticky at the top of the page about walk back tune.

Then go onto to broad head tune.

Of course all this means squat if your arrows are under/over spined for your set up.

Also spin test the arrows to make sure the is no wobble at either end of the shaft and to make sure your broad heads spin true.

bigcountry

My money is on the spin test.

Irish Knots

THANKS GUYS

had the bow tuned.... spin tested arrows - all seemed decent after-

but still not what i like to see as far as grouping goes!
might try mechanicals to see if i can group better!

open to other ideas!

thanks again

Austin/WI

Mechs won't solve the real problem. How was your bow tuned? Just through paper? Did you shoot it, or did someone else shoot it? The more info you can give, the better. IMHO paper tuning is not that helpful if you don't finish the tuning process by walk back tuning or straight up BH tuning.

BOWHUNTERCOP

spin the arrows on the tip of the broadhead, see if there is a wobble

Dopler

Since you say you're tuned and your arrows are straight... Try 2 things, first switch to a low profile broadhead, if that does not work, switch to a hybrid arrow like a FMJ or ACC. Carbon arrowsdo not have a consistent spine and pose a huge flight problem at high speeds.

Irish Knots

I shot paper at lunch..... perfect (according to pro) said it was as clean as a bullet hole
he tuned arrows (inserts) shaved them down to take out imperfections
shot his targets better yet but still not as good as i would like.

tried Muzzy 4 blade low profile 100 gr - again a little better (this was before all the tuning)
will try them again tonight - thanks guys i'm sure you know those of us who shoot (lots) how this stuff can get you going!!!! I know i'm a much better shooter than is showing right now - driving me nutz!

so i plan to try again with original setup
and try 4 blade muzzy 100gr.

then who knows what is next

live2Draw

How is it that I am shooting at right around 290 fps with a carbon arrow, and can get montecs to group great at 60 yards then......

Carbon arrows are not consistant....if you bought them 6 years ago....

Dopler

Becasue you're using a montec which was the first of my suggestions to solve his problem. What's your definition of grouping great? I still doubt you're shooting perfectly at 60 yards with carbons and fixed heads at 290fps, you can say that here on the thread but guys can say anything in cyberspace and half of the guys doing it evenbelieve themselvesand then theyget mad when you call them on it ;-).Yes, carbon arrows have come along way but the fact remains, there is not a consistantcarbon arrow made, it's impossible to due to the nature of the material. Do some googling on carbonchemistry, there have been some articles published on tehr downsides of carbon arrows on this very topic by guys a lot smarter than us both. Anyway, I've talked about this before and I'm on the record so I don't want to beat a dead horse, I was just trying to give the kid some advice which I think might help.