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cerebus111
10-23-2011, 02:26 PM
I have a PSE Stinger...I shoot at 65# 27.5 draw and 388 grain arrow.the IBO on this bow is 318...I wanted a faster bow so I bought a Silencer..its IBO is 330..I was told it would be faster and I would notice....The Silencer is set the same using same arrows..Can't notice any difference in speed...Starting to feel like I just wasted my money. any comments ?

Spiker
10-23-2011, 02:33 PM
Do you know what real speed you are getting out of both the bows?

MLN1963
10-23-2011, 02:43 PM
Unless you chronograph both bows you won't know what they are really doing. My FC400, same as your Silencer, is faster than my son's Pantera. We chrono'd them a while back and I was about 20 fps faster. But just shooting them you can't tell it.

BTW your Silencer is IBO rated at 335-345 FPS, not 330.

cerebus111
10-23-2011, 02:50 PM
No haven't chrono them...just by feel I know its not exact..lol..BTW MLN where are you in SW OK...I'm in Del City

MLN1963
10-23-2011, 02:51 PM
Altus area.

Hutch~n~Son Archery
10-23-2011, 02:53 PM
Do you know what real speed you are getting out of both the bows?


Unless you chronograph both bows you won't know what they are really doing. My FC400, same as your Silencer, is faster than my son's Pantera. We chrono'd them a while back and I was about 20 fps faster. But just shooting them you can't tell it.

BTW your Silencer is IBO rated at 335-345 FPS, not 330.
Both these guys are telling it like it is you can't tell unless you see it in the writing on a chrono.




Hutch:cool:

bigredhunter00
10-23-2011, 02:59 PM
IBO for the 2012 Silencer is 330-340, while the ibo for the 2011 is 335-345.

MLN1963
10-23-2011, 03:07 PM
IBO for the 2012 Silencer is 330-340, while the ibo for the 2011 is 335-345.

It makes you wonder doesn't it? Honestly I think the 330-340 is a more realistic number.

justin
10-23-2011, 05:40 PM
I got some hutch~n~son strings and i got 15 fps for free! Before i underrated my ibo, but not anymore!!!

kylecurtis04
10-23-2011, 07:04 PM
It makes you wonder doesn't it? Honestly I think the 330-340 is a more realistic number.

I second this notion. Which to me 340 IBO leaves you plenty of speed. I feel a lot of archers get caught up in speed. But if they want speed, then more power to them. Everyone has their preferences.

polaris754
10-24-2011, 01:14 AM
if i understand this correct ,the ibo,s r rated at max draw,to achieve those ibo speeds ,is that correct?

madlaz
10-24-2011, 01:55 AM
Bow set at 70 lb draw 30"draw lenght with 350 grain arrow for IBO

MLN1963
10-24-2011, 05:39 AM
I think bowtech and one other use 29" and 70# but 30"/70# is the norm from what I have seen.

cjchasman
10-24-2011, 06:45 AM
No haven't chrono them...just by feel I know its not exact..lol..BTW MLN where are you in SW OK...I'm in Del City

I'm not sure you will feel 20 or so fps. If your stinger is a 2011 or 2012 rated in the 316 to 318 fps range and your silencer rated at 335 fps or so I believe you would need a chrono with out a doubt. That said the Stinger fps drop down to 304 fps in 2010 and older. That is a bit of a difference in base performance vs. the silencer. I still say you need a chrono but if this is the case there may be a problem w/ the set up of the silencer. Just my opinion.

bfisher
10-24-2011, 08:15 AM
I have to agree with the guys. Unless you do a ton of shooting and do so all year, every year it's virtually impossible to tell as much as 30 fps difference. Our eyes just aren't that good. A few years back some friends watched me shooting a new bow and commented on how fast it was. They figured it was clocking close to 300 fps, but in reality it was shooting about 264 fps. A chrono is the only way to be accurate with speed estimates. Even these on-line calculators can be off by as much as 30 fps because they use advertised IBO speeds as a basis when these are usually quite inflated.

Ford
10-25-2011, 07:48 AM
i agree with everyone. IBO is over rated, and not always accurately reported. The only thing to get any where near ibo is to max out everything, and shoot with nothing on the string. If your dimmensions arent max and bare string, you are completly waisting your time trying to figure out speed with out a chrono. Once you do, you will probably be surprised at the results.

MLN1963
10-25-2011, 09:30 AM
i agree with everyone. IBO is over rated, and not always accurately reported. The only thing to get any where near ibo is to max out everything, and shoot with nothing on the string. If your dimmensions arent max and bare string, you are completly waisting your time trying to figure out speed with out a chrono. Once you do, you will probably be surprised at the results.

There is a lot of truth to this.

There are multiple ways to come to an educated guess about the performance of a bow, calculators or running the numbers by hand and so on. Although you won't get laboratory results, you will get an idea if the bow is living up to it's claims. There are many brands that come very close or exceed the IBO numbers given. There are other brands who don't. The brand you just sold has a reputation for not meeting the claims, the brand you replaced it with has an excellent track record of being right at the mark. If I buy something that says it does something I expect it to do just that.

bcriner
10-25-2011, 10:31 AM
I have never achieved the IBO that Martin states on any of their bows and I have been shooting them for 23 years. When it says 315-320, I usually always end up about 2-3 fps lower than the minimum such as 312-313. With my '09 Shadowcat at 315-320, I got 312. With my AlienX at 330-340, I got right at 330. It has nothing to do with tuning. I know how to properly do that. Even had Crackers do several over the years. Always ended up approx. 5fps under what Martin says. As a rule of thumb, I tell my customers that when it say 330, assume 325 and you won't be disappointed. I haven't setup a bow yet for Martin that has made the peak.