will this work
 

I was planning on shooting the easton axis 340 with 100 gr. heads. Now I'm considering shooting 125's, but I don't know if this will work with the 340. Should I maybe go to the 400? Assume that both arrows would be fletched with feathers. My setup is a razortec, 66lb, 29.5 draw, drop zone rest, and d-loop. I don't have a problem shooting either setup, just wondering what would "theoretically" work better. Thanks

RE: will this work
 

I think that you will be just fine.

RE: will this work
 

If it takes 340's to spine up right with 100 gn tips, then 400's would definitely be way underspined with 125's.

You may know this, dwd, but there have been several questions about Easton/Beman sizing here lately, and I don't know if it's ever been fully explained. So, hang in there with me for a minute.

Easton and Beman size their shafts by deflection (amount of bend) in thousandths of an inch, using a spine tester. Deflection for the 340's is .340", and .400" for the 400's. The further the shaft bends under the weight, the less stiff the shaft is. So, size 300 is stiffer than a 340, and 340 is stiffer than a 400.

RE: will this work
 

Arthur so if I'm shooting Carbon Express 6075's which would be the best broadhead to use the 125's or 100's considering I'm shooting them from a BowTech Patriot dually 60# and 28" draw,can you give me an idea what kind of speed I might be looking at ?

nubo

RE: will this work
 

nubo, depending on how long the arrows are, I'd say whichever one gives you the best FOC.

RE: will this work
 

pdq 50h the arrow's would be 28".

nubo

RE: will this work
 

dwd

If your arrow is 28.5" 100 gr. you are 403 gr. at 11.5 foc and a 125 bh at 428 gr. and 13.5 foc. IMO you are just right!!

A 300 axis at 28.5" and a 125 bh is 461 gr. and foc is 12.6% and the 100 gr. at 10.6.
You might try different size field points and see what fly's best.


Nubo

I shoot 6075 TH out of a pat sc at 70 @ 28
100 gr. is 462 gr and 9.7 foc
125 is 487 and 11.6 foc% and i'm useing feathers at around 245 fps. With vanes they will be 505 gr. and 9.7 foc.
If you are at 60 & 28 i'm guessing you be in the 255-260 area. Just a guess though..

fishon

RE: will this work
 

Thanks fishon 01 I'm only planning on using the 6075's for the moose hunt for the extra KE I will be using a 7gpi arrow for deer and 3D not sure which brand yet ,right now I'm shooting Carbon Force 200's and Dominator's.

nubo

RE: will this work
 

fishon, sorry... my arrow length is 31.5" I think nubos is 28.5, but do you still think mine will be right?

RE: will this work
 

dwd

The 340 at 31.5 is 432gr. and 10.8 foc
125gr is 457 and foc is 12.8!! sounds good but the charts say 300's

which they are, 468gr. and 10% foc. 100gr heads
125's are 493gr at 11.8 foc ;)

You can also find these numbers at bowjackson.com.......fishon

RE: will this work
 

just want to make sure I have this correct. The lower the FOC, the less shaft there is in front of the center of pressure. So the lower the FOC, the better is this correct?

RE: will this work
 

That's not right, dwd. The HIGHER the FOC the less arrow shaft is in front of the center of pressure. So the higher the FOC, the more stable the arrow is. But if you go too high, your trajectory suffers. I like to stay between 9 to 12% FOC with my arrows.

nubo, I don't know enough about the Patriot to make an estimate at what speed you'll get. Heck, I don't know what kind of fletching you're using or even whether the Terminators you've got are black or camo. If I were to hazard a wild ballpark guess, I'd guess around 230 fps.

Whether you go with 100 grainers or 125's is up to you. You'll have to shoot each size and pick the one that shoots most accurately and consistently for you. I would assume that would be the 125's, both because of better FOC and they'll probably make those 6075's spine out a little better for your setup.

RE: will this work
 

I'm shooting 125's with my Axis 340's ! My arrows are 28" and fletched with 4" Bohning vanes ! They weigh 450 grains on a digital scale !

They were shooting good for me at 69# , but I cranked my bow up to 75# and they grouped better ! I shot a bare shaft at 20 yrds @ 75# and it hit with my fletched group(first arrow I have ever had do that) !

Makes me think they are pretty stiff arrows though ! Anyway....good luck !! :D

RE: will this work
 

Bow Jackson says the foc is 12.8% with the 300's and 11.8% with the 340's, so the way I see it, either arrow should work. I just need to do a little experimentation to see... darn I hate it when i have to shoot my bow:D