PDA

View Full Version : How's my speed??



jbowers12
04-17-2009, 04:40 PM
I finally got my bow chronographed.

I am using a 366 grain arrow and 29 in draw length.

At 70# 278fps dupli 3 times in a row.
At 64# 265fps average
I also shot a 410 grain arrow and it shot 268fps at 70# average.

Is this good or bad??:confused:

Jake-the-snake
04-17-2009, 08:37 PM
For a bengal id have to say thats darn good, at 265 FPS and with a heavier arrow, thats more than enough kinetic energy to get through a deer at 35 yards and beyond.... all in all not to shabby, but my firecat throws a 430 grain arrow out there at 288fps:p:D:D, but my CX Maximas chrono around 305-308

jbowers12
04-17-2009, 09:05 PM
I will probably upgrade too a firecat pro x next year.:D

But for now i got my 09 bengal fair enough.:D

navydave
04-18-2009, 12:52 PM
I finally got my bow chronographed.

I am using a 366 grain arrow and 29 in draw length.

At 70# 278fps dupli 3 times in a row.
At 64# 265fps average
I also shot a 410 grain arrow and it shot 268fps at 70# average.

Is this good or bad??:confused:

2 me, that seems a little slow for the 366gr arrow, are you positive about the draw weights and are your specs in on the bow ATA/BH, for a bow that advertises at 315-320IBO, you should only loose about 10 fps for the 29"DL and about 6fps for the 18 gr's arrow weight over IBO arrow weight. So I would think you should be a little closer to 300fps even if your bow is hitting closer to the 315 marke at IBO instead of the 320 they advertise as max.

jbowers12
04-18-2009, 03:16 PM
Well everyone now these days fibs a little about ibo bow speeds.;) And im sure about the poundage.:rolleyes:

Also I have a bunch of centerserving iv got now. im going to shrink it to about 2 in.

all iv got on the string is a d-loop and 8.5grain fletcher peep with no tube.

And no silencers. I may mess some with some speed nocks or something i dont know.

Iv not got it tuned great yet either or not like i usually do. I will eventually mess around with the string stopper. Set the draw length about a half an inch long and set the string stopper so there isnt such a valley in the wall. That should gain 3-5fps or something like that.

I'll work on it.:cool:

dbd870
04-19-2009, 03:08 AM
Agreed. seems a little slow to me as well using the 70# and 366gr arrow.

jbowers12
04-19-2009, 07:20 AM
:confused:I guess i'll try another chronograph today.

To me it sounds about right....:confused:

jbowers12
04-19-2009, 05:55 PM
I dont know but i tried another chrono today and got 274fps 10 times with the 366 grain arrow at 70#.:confused:

lower than that at 60

My ata and bh were off by a quater of an inch both:confused:

does anyone know how to fix it.?
Thanks

navydave
04-19-2009, 10:00 PM
I dont know but i tried another chrono today and got 274fps 10 times with the 366 grain arrow at 70#.:confused:

lower than that at 60

My ata and bh were off by a quater of an inch both:confused:

does anyone know how to fix it.?
Thanks

ATA too long you shorten your shooting string, vice versa for too short. This will bring both ATA and BH back into specs. Just be dang careful when you put tension back on the strings that everything is back in the right place. before you put full tension and then look again everywhere before you draw the bow.