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Guesstimating Power after Barrel Change

  • 09-03-2011 11:02pm
    #1
    The_ChiefDUB
    Registered Users, Registered Users 2 Posts: 365 ✭✭


    Okay I'm guessing this would be tricky but since I don't have a chrono I'm clutching at straws.
    I've just ordered a tight bore barrel for my M4 and since I don't have a spare gun and don't have a chronograph either, if I end up going over the limit when I have it installed and get out to a site, that pretty much means a wasted day.
    Does anyone know how you might calculate the energy increase you will get when installing a tight bore.
    I have a KWA M4 - firing consistently at .93j (like five or six tests in a row with no movement) with 0.2g BBs. I will be removing the stock barrel and installing a mad bull ver 2 with a diameter of 6.03mm and a length of 407mm. The stock barrel has a diameter of 6.05mm and a length of 394mm.
    Any help would be greatly appreciated and I would also be suitably impressed by your maths know how.


Comments

  • #2
    Leftyflip
    Registered Users, Registered Users 2 Posts: 7,463 ✭✭✭Leftyflip


    Add roughly 20fps to your current fps.


  • #3
    The_ChiefDUB
    Registered Users, Registered Users 2 Posts: 365 ✭✭The_ChiefDUB


    Perfect. Thanks a million.


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