Hunting Washington Forum

Equipment & Gear => Archery Gear => Topic started by: gutsnthegrass on August 17, 2015, 08:16:40 AM

Title: Is my Bowtech RPM 360 at IBO spec?
Post by: gutsnthegrass on August 17, 2015, 08:16:40 AM: I was finally able to get out and shoot my new bow. IBO is rated at 360fps, I know this is at 70lbs, 30" draw and 350gr arrows. My setup is 70lb, 29" draw and 420gr arrows. I shot my bow through the crono and was getting 310fps. I think I have seen a calculation out there to figure out what my specs would reference to if I was at IBO specs. I was able to figure out that I am getting 89lbs of KE wich I am very happy with and my FOC is only at 10%. I read that 10% is on the low side, should I be concerned with this at all.

Thanks
Title: Re: Is my Bowtech RPM 360 at IBO spec?
Post by: Jellymon on August 17, 2015, 08:29:37 AM: Sounds about right to me. My calculation puts you about 6fps short, with peep and dloop. Most RPM's didnt hit thier IBO anyways, they are more of a 350 IBO bow. You're still getting a ton of speed out of it though. With that draw length and speed with those arrows you have way more than enough to easily take anything in North America.
Title: Re: Is my Bowtech RPM 360 at IBO spec?
Post by: coachcw on August 17, 2015, 08:34:50 AM: sounds about right what rest ?
Title: Re: Is my Bowtech RPM 360 at IBO spec?
Post by: gutsnthegrass on August 17, 2015, 10:11:10 AM: Rest is a Ripcord, might switch to a QAD though.
Title: Re: Is my Bowtech RPM 360 at IBO spec?
Post by: coachcw on August 17, 2015, 10:14:12 AM: Quote from: gutsnthegrass on August 17, 2015, 10:11:10 AM
Rest is a Ripcord, might switch to a QAD though.
:tup: i get 310 out of my overdive at 420/30draw 70lbs
Title: Re: Is my Bowtech RPM 360 at IBO spec?
Post by: Taco280AI on August 17, 2015, 10:27:30 AM: Depends on the amount of weight on your string. Using an online calculator and guessing 20gr on the string, it says 320fps for your setup.