Something ain't jiving with my new Old Glory
#11
Join Date: Dec 2003
Location: Florida Panhandle
Posts: 273
RE: Something ain't jiving with my new Old Glory
"Every 3 grains of added arrow weight results in approximately 1 fps speed loss."
315 fps
- 30 (losing 3" draw off IBO)
- 40 (470-350 = 120; 120/3 = 40, losing 1fps/3grains)
= 245 fps
I chrono'd my bow around 235, which is about right with the brass knock and string silencers taken into account.
#12
RE: Something ain't jiving with my new Old Glory
I was looking through the Bowtech manual and was kind of surprised to see that they figure only loosing about 3fps per 10lbs of draw weight. I thought is was more than that.
What is the usual figure for draw length? I was thinking along the lines of 10fps for every inch.
What is the usual figure for draw length? I was thinking along the lines of 10fps for every inch.
I normally go by 10 fps for every inch of draw length though have seen it down to about 7 fps depending on the bow/setup.
#13
Thread Starter
Join Date: Feb 2003
Location: Fargo ND USA
Posts: 124
RE: Something ain't jiving with my new Old Glory
After seeing some of the other #'s from BC's on OG's, I must have got one of the slower ones. There's one for sale on AT right now that has 30" 60 lbs. 300 gr. arrow at 317. I'm an inch longer in draw, yet 3 ft. slower than that. [:@][:'(]
#14
Join Date: Dec 2003
Location: Kansas
Posts: 316
RE: Something ain't jiving with my new Old Glory
My BC said 305 fps at 29.5" and 60#'s. Not the fastest I have seen, but man, this baby rocks. I am just fine with the one I have. I would guess it would put me up around 310 at a 30" draw.
JMAC
JMAC
#15
Thread Starter
Join Date: Feb 2003
Location: Fargo ND USA
Posts: 124
RE: Something ain't jiving with my new Old Glory
Alright, the mystery continues: I measured all the specs on the bow tonight, and the axle to axle was dead on at 37.25. However, the brace was 7 5/8, not 7.25. Also, I put the bow on the scale, and it peaks at 61 on my scale, and at the point where the draw stop hits the limb, it reads 26. That is definetly not 80%. More like 57.4 And the draw stop is at the longest setting. I don't have a crank board to more accurately test this, but it's close. And just the feel of the valley tells me it's not anywhere close to 80%. I don't get it; things just aren't adding up here.
Thoughts anyone?
Rod
Thoughts anyone?
Rod
#18
Thread Starter
Join Date: Feb 2003
Location: Fargo ND USA
Posts: 124
RE: Something ain't jiving with my new Old Glory
My bow is in my locker at the club, but I'll try to get over there tomorrow to snap a pic or two. The cams are right on if you go by the lines that are marked on them.
#19
Join Date: Dec 2003
Location: ohio
Posts: 32
RE: Something ain't jiving with my new Old Glory
My OG BC says 316@ 30" and 70#. The 30" cams weren't close to fitting me (Ive been shooting 30" Hoyts for 10 yrs) so I went to the 30.5" cams. Now with no marks from the factory how does one know if the cams are set-up right? Would the specs change going to different cams? Thanks for any info. sjb3
#20
Join Date: Feb 2003
Location: Alvo Nebraska USA
Posts: 2,057
RE: Something ain't jiving with my new Old Glory
Hey Phil,,, can you snap a picture of your Old Glory's cam position in relation to the limb surface for the guys?? I don't know if it's the same for the Allegiance or not but judging by the pictures of the bows, it looks like the Old Glory has a different limb angle than the Alleg.