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Post by awshucks on Jan 1, 2009 19:56:11 GMT -5
I'm shooting a 200 lb Excal. 20" Gt's in a plethora of different weights. All have brass inserts vs alum [add 78 gr] and range from 400 gr to 446 gr. total weight.
I haven't done the exact testing you are looking for, but can tell you there's about a 7" drop from 20 to 30 and close to 15" from 20 to 40 yds.
There's a lot of variables that can come into play here. FOC, Vane type, over-all arrow weight, and for the Excal guys, string choice.
There's about 10-15 fps diff in FFF and Dacron. Then, 3-5 or so in brace height.
I use a "Boo" custom Flemish Excel w/ served on cat whiskers, which costs me 8-9 fps from FFF, but well worth it.
I had a dozen customs made a couple years ago, fat walled GT's, 4" vanes, wraps, and w/ 100 gr Slicks they weigh about 446 gr and come out of my bow at 295 or so. I like them for hunting cause I'm gonna gig a bear one of these years, lol and they have higher K.E. My supply is dwindling and I'll go to same arrow sans wrap at about 435 gr til they are gone.
The thin walled GT's w/ 2" Blazers w/ 100 gr points get the best groups benched [1"-1.5" to 50 yds] and are going about 315 fps.
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Post by BT on Jan 1, 2009 21:13:33 GMT -5
I haven't done the exact testing you are looking for, but can tell you there's about a 7" drop from 20 to 30 and close to 15" from 20 to 40 yds. Thats a pretty darn good flight trajectory out to 40 yards.  Actually....thats better than pretty darn good  |
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Post by awshucks on Jan 4, 2009 23:56:46 GMT -5
I haven't done the exact testing you are looking for, but can tell you there's about a 7" drop from 20 to 30 and close to 15" from 20 to 40 yds. Thats a pretty darn good flight trajectory out to 40 yards. Actually....thats better than pretty darn good I'll do some exact tests for you when I get time, the previous was from memory, dangerous habit these days.  I do recall at 30 yds w/ one string and arrow weight I can't recall, I was amazed that each yard short or long from exactly 30 was about an inch diff, either high or low depending on target being farther or closer. I also am a big fan of the range compensating scopes like the Vari-zone. As long as your arrow speed is between 250 and 350 they adjust to be spot on at 20 thru 50. Real heavy arrows can be an exception w/ my Leupold VX II 2x7 w/ xbow reticules to 60. never tried the heavy weights [482 gr] w/ a V-zone. W/ the VX II, I couldn't get them all to be 'on'. The V-zones are 2.5X4x Once you have the extended ranges dialed in, the half way points are dead nuts too, like 25,35, ect. Most of my GT's have about 17-20% FOC. I'm using an AZ EZ in rt helical which is about 8 degrees which w/ 4 or 5" vanes probably doesn't help trajectory any. I would think the 2" Blazers would have the least drag/drop. I think these range compensating scopes tend to make one less concerned about what the arrow is doing as what ever drop you have is dialed out of the equation. I don't know if you've seen an Excal fibre optic pin, but w/ green dot at 20, the post below it is dead nuts at 30. [Picture a duplex type scope w/ nothing beyond the duplex except the green dot in middle] One can get 3 aim points out of it if they don't mind the upside down top black 'post' and bottom black 'post' There's just so many variables here, one guys results can be a lot different than the next. |
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ghost
Senior Board Member
Posts: 813
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Post by ghost on Apr 4, 2009 20:42:09 GMT -5
I am looking for some numbers here....to get an idea of what we are averaging. Whats the drop between your first and second pin/dot? I was out shooting to day and decided to answer TB’s questions about arrow drop at different yard intervals. I checked my sights at 20 yards to make sure it was hitting the center (or very close for an old guy ;D) of a 1.5 inch circle. I moved to 10 yards and using the 20 yard cross hair I shot a group of arrows. The average rise was 2 inches from the aim point. At 30 yards another group averaged between 6 to 7 inches below the aim point. At 40 years the arrows grouped between 12 to 14 inches below the aim point. Ghost |
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Post by BT on Apr 6, 2009 6:30:21 GMT -5
Thanks Ghost  I have been very busy for a few weeks now and haven't been able to get to this thread since you posted. A 7" drop for every 10 yards beyond the flat flight of the bolt isn't too bad |
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Post by awshucks on Apr 29, 2009 12:42:11 GMT -5
BT: I still haven't gotten out to do those test, but can see Ghost pretty well covered it all in his. Here's a link to two different Excals results, one is 150#, the other 200# both same weight arrows. www.excaliburcrossbow.com/phpBB2/viewtopic.php?t=26555As you will see fro my post there, I can only get 36 yds here from my bench. I'm a fan of 'give 'em a dose up close' so the 36 yds is a tad farther than I need. |
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Post by BT on May 3, 2009 17:32:33 GMT -5
Thanks |
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