Dual Bottles @ EBR?

Forums Benchrest Benchrest Talk Dual Bottles @ EBR?

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    dwilson050
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    I've heard a little bit of chatter about not being able to use dual bottles at EBR (can't remember where I came across this?).  I doubt is's true but wanted to pose the question to the forum. Has anyone else heard this? I tried sending email via the contact section on the EBR site but it appears that mailbox isn't monitored.

    Thanks,  -Dave

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    dwilson050
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    Just to clarify… dual bottles like on a modified Impact.

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    Centercut
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    Maximum air capacity at EBR is 580cc, so dual bottles are not allowed.  Shouldn't be a big deal, just put the stock bottle adaptor on your gun and use a bottle from the dual bottle setup…  There are other rules this year that may affect some shooters, such as for Speed Silo, magazines are limited to stock (not modified) mags and to 18 pellet capacity maximum.   All rules are listed on the EBR link below.

    http://www.extremebenchrest.com/rules/

    Extreme Benchrest Rules:

    • Any pellet gun up to .30 caliber may be used
    • No solid slugs or cast bullets allowed (mass production diabolo pellets only)
    • No power restrictions
    • No weight restrictions
    • Target distance will be at 75 yards and 100 yards
    • One piece rest are allowed
    • Tethered tanks are not allowed
    • Total air cylinder volume limited to 580cc
    • Fill as many times needed during shooting relay. Note…for safety, rifles may not leave bench during a relay.
    • This reply was modified 6 months ago by Centercut.
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    dwilson050
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    Interesting… I read the rules but I thought when it said "air cylinder volume" was limited to 580cc, I thought they meant per cylinder.  Thanks for the clarification.  -Dave

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    Centercut
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    Yeah, there was a lot of back and forth about having that much air being unfair to other shooters that didn’t have an Impact. Might as well allow tethering if you’re going to allow 1.2 liters of air. I found a 1.95 liter bottle that is 3.5 inches diameter and 20 inches long that I’m going to strap to my .30 Bobcat at RMAC next year. I’ll get at least 200 shots per fill. ;)  It’s not tethering if it’s part of the gun. Fair is fair. 

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    dwilson050
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    Lol!   Makes sense.  Just need to remove the dual manifold and move the Wiki gauge back (off the manifold). Gives me a good reason to tinker!  ;)

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    Lewis
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    Centercut

     I found a 1.95 liter bottle that is 3.5 inches diameter and 20 inches long that I’m going to strap to my .30 Bobcat at RMAC next year. 

    Do you know what a typical 480/580 cylinder diameter is? Will this fit the redwolves,impacts etc?

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    Spray1Mark
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    61-62mm for the INOCOM which are not perfectly round and 60mm for the ACECARE 500cc which is perfectly round Lewis.

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    Scotchmo
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    I have a related question.

    "Total air cylinder volume limited to 580cc"

    On a bottle gun, that would obviously include the bottle volume. But does that 580cc also include the air tube/plenum volume that precedes the valve?

    I'm planning on configuring a gun to compete at future EBR events, and this will affect the bottle size that I choose.

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    Centercut
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    580cc bottle is allowed. 

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    Scotchmo
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    Centercut

    580cc bottle is allowed. 

    I'm not asking about just the bottle.

    Do we include the volume of the integrated cylinder/tube/p!enum in the "total"? If not, what do they mean by "total"?

    Most (or all?) of these guns are regulated. Maybe they mean "total" as applied only to the regulated volume.

    • This reply was modified 2 months ago by Scotchmo.
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    Franklink
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    Scott, 

    I've read elsewhere that you are waiting on a Raptor. Yes it has a large plenum. 

    Of course it comes down to EBR organizers decision, but a single bottle Raptor does not seem to me like it would be affected by the double bottle ban. 

    If I'm making incorrect assumptions about the gun in question I apologise. 

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    Scotchmo
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    Franklink

    Scott, 

    I've read elsewhere that you are waiting on a Raptor. Yes it has a large plenum. 

    Of course it comes down to EBR organizers decision, but a single bottle Raptor does not seem to me like it would be affected by the double bottle ban. 

    If I'm making incorrect assumptions about the gun in question I apologise. 

    Your assumption is correct – that's why the question. Full size Raptor with a 500cc bottle + 90cc tube/plenum = 590cc.

    I see that some people are already using 580cc bottles with expanded plenum sizes. So they are over 580cc total air volume. That's why I am now thinking that the unregulated volume (the plenum on an otherwise regulated gun) is probably not included in the total. Just wanted to make sure.

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    Franklink
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    From Centercut:

    • Total air cylinder volume limited to 580cc

    The link he provided to the rules and his copied and pasted bullet point lead me to believe you'll be fine. It specifically states "air cylinder volume." 

    Of course that opens it up to some knucklehead to plumb in a bunch of stuff that isn't specifically "air cylinder," but I think a Raptor is within the letter and spirit of the rule. 

     

    • This reply was modified 1 month ago by Franklink.
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    steve123
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    I'm pretty sure the 580cc bottle + whatever volume the plenum is, would be allowed because not allowing that would piss off too many shooters (most shooters??) already using that set up. I doubt the EBR rule makers even considered plenum volume because this tiny amount more air volume isn't worth nitpicking about compared to double cylinders or tethering – IMO, but I've been wrong before, lol.

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