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Post by cday on Sept 28, 2005 19:25:03 GMT -5
Guys I am having a problem with consist arrow flight out of my crossbow. I have a few arrows that shoot broadheads dead on and then a few more that shoot center but high and the other few shoot way to the left. I have spinned checked each arrow and they do pass the spin test. I am shooting a 22 inch 2219 easton arrow with 5 inch ring wing feathers and a 100 grain two blade magnus broadhead. I use a rope cocking device everytime and my string is line up correct everytime. I though I would re-fletch my arrows with feathers again going to the straight instead of helical style to see if this improves any thing. I did have vanes on the arrows at first and arrow flight was even worst. Any suppestions? Looks like I will be starting the season out with my old compound bow.
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Post by kansas on Sept 28, 2005 20:55:57 GMT -5
Most crossbows shoot best with a 1.5-2 degree right offset. Also make sure your feathers are not hitting the bottom of the barrel track. This will cause the arrow to stick up a little in the barrel and cause erratic flight.
Why feathers instead of vanes?
Kansas
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Post by cday on Sept 28, 2005 21:24:04 GMT -5
Feathers helped better to stablize arrows more quickly especially with broadheads. This is especially true with shorter arrows from regular compound bows. Mine shot fine with field points using vanes but arrow flight was so erractic with broadheads it was hard to even adjust for. My other crossbow was the same way filed points and vanes it shot good put a broadhead on and your guess was as good as mine as to where the arrow was going to go.
I have right wing feathers so the straight fletching might work well and because of the shape of the feather it still will allow some spinning in flight to help stablize. I figure the offset angle was causing some arrows to drag more in the barrel slot.
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Post by cday on Sept 29, 2005 2:29:03 GMT -5
I think I found my problem. I stripped the feathers off one of my arrows and refletched the feathers using a straight jig instead of the right wing helical. After comparing the straight fletch arrow with one in the helical I noticed the helical looked like due to the angle was causing too much pressure to the cock feather while traveling downthe barrel groove. I know feathers are more forgiven when it comes to fletching contact but that much pressure and drag to the right side of the groove in the barrel could be too much. Also not every arrow looked like it had that angle and kick to the right and could explain why some arrows grouped different than others. We will shoot it tomoorow and see what happens.
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Post by John on Sept 29, 2005 17:57:52 GMT -5
cday:
I use 4" Feathers and 3 and 4 Blade fixed Broadheads. Shooting from a Exomag Crossbow. With this I have a 5 deg. offset. These are shooting like missles from the track with no problems at 35 yds. I am always checking that the limbs are secure and the riser holding everything square to the deck. But I have found no problems with feathers or helical when coming out of the track. I tested these and Vanes (plastic) 4 and 5 in. Quite a bit as Woody can tell you, posted on Excal. site. Feathers always worked best with broadheads and some deg. of offset worked wonders. Hope this helps.
John
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Post by garyl on Oct 13, 2005 6:58:46 GMT -5
cday: I use 4" Feathers and 3 and 4 Blade fixed Broadheads. Shooting from a Exomag Crossbow. With this I have a 5 deg. offset. These are shooting like missles from the track with no problems at 35 yds. I am always checking that the limbs are secure and the riser holding everything square to the deck. But I have found no problems with feathers or helical when coming out of the track. I tested these and Vanes (plastic) 4 and 5 in. Quite a bit as Woody can tell you, posted on Excal. site. Feathers always worked best with broadheads and some deg. of offset worked wonders. Hope this helps. John I sure agree with john, most two blade BH take some work on tuneing up your bolt and in MOST CASE'S require a slight helical. As for hanging up in the track or rubbing the track it will also depend on which xbow as I can go 4 -5deg. with my Excalibures or TenPoint but not so on a Horton. Just my .25 cents worth....  |
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Post by jdmiller on Oct 13, 2005 8:34:32 GMT -5
I fletched my Super Carbon bolts with my Bitzenberger with the least amount of degree with a right helical clamp . They fly great out of my Parker with no problem with rail contact . I experimented with a straight clamp with various degrees of offset and noticed my groups improving as I increased the degree offset . The right helical clamp with the way I have my Bitz set is at the breaking point ....if I increased the offset with the helical clamp... the groups started increasing with too much contact and drag on the rail . Its a fine line to get the accuracy you want and not create more problems . As many have stated ...it depends on the brand your shooting and what will work the best.
Im shooting a Wasp Hammer SST 125gr. and have a total weight of 425gr. From 10-30yds I can destroy bolts with this combination and honestly only shoot one bolt at a time now to keep this from happening . At distances beyond this ...say at 40yds ...my groups open up a little more but I think the problem is more with me than anything else . I use a red dot with no magnification and my eyes are not as good as they once were.
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Post by garyl on Oct 13, 2005 10:20:46 GMT -5
Reads as you have a good set up now. I use the Arizona EZ Fletcher with a 4 degree offset, feathers, 100gr. SlickTricks and like you can tear up the bolts.
On the Max same set up but 125gr.BH for 424-425 total grains and shoot really good from my Max. I is leaving things as they are.
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