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PostPosted: Wed Oct 07, 2015 4:20 pm 
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Location: Coalmont BC
For those of you that haven't already heard.... the 200 gr. Bob's Boattail "Whiteout" bullet I designed for the Extreme Benchrest Contest, which took place in Arizona last weekend, placed 1st and 2nd in the 200 yard Pro Division.... The gun is a .308 Extreme by Brent Hoag, running on Helium, shooting 970 fps (420 FPE)....

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The bullet was designed to have the minimum possible drag to minimize wind drift.... The mold was made by Veral Smith of LBT.... The concept of the gun was to duplicate the ballistics of the .300 AAC Blackout (.300 Whisper) PB round, and during testing they pushed the big 200 gr. to 1080 fps, IIRC....

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The gun was very late being assembled and tested, they only had 3 months for the whole project from concept to the event.... It regularly prints 5 shot groups with all the holes touching at 100 yards, but the consistency at 200 yards isn't yet where we want it, although it did manage to print the group below at 200 yards, showing what it is capable of....

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The shooters were able to hold on target at 200 yards, even though the wind was gusting 12-20 mph during the event.... Chris Alls shot 169-3X and Mike Pangle shot 168-1X out of 200 in horrible conditions.... Examination of the targets showed that some of the flyers were showing a bit of yaw, so the bullet is a bit long for the 8" twist, something we will correct by pushing the Meplat back slightly.... Doug Noble, who placed 3rd with a 165, shot too many bullets at one target and lost out on the win, so the guys from Virginia didn't have it all their way.... Doug was shooting a .308 cal highly modded Condor.... Next year, Helium will not be allowed in this category, although AoA say that their may be an Unlimited Division to include it....

Bob

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Dominion Marksman Silver Shield - 5890 x 6000 in 1976, and downhill ever since!
Airsonal; Too many! Springers, Pumpers, CO2, but I love my PCPs and developing them!
Proud Member of the 2000+fps Club!


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PostPosted: Wed Oct 07, 2015 5:21 pm 
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Joined: Tue Jan 29, 2013 6:54 pm
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Location: Northeastern Ontario
Congratulations, Bob. You have achieved something significant.


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PostPosted: Wed Oct 07, 2015 5:38 pm 
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Indeed - congratulations!

What pressure was the helium used at?


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PostPosted: Wed Oct 07, 2015 6:11 pm 
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Between 3900-4500, I'm not sure of the exact level, if they topped off every shot or every 3 shots.... you could not shoot tethered....

Bob

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Dominion Marksman Silver Shield - 5890 x 6000 in 1976, and downhill ever since!
Airsonal; Too many! Springers, Pumpers, CO2, but I love my PCPs and developing them!
Proud Member of the 2000+fps Club!


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PostPosted: Thu Oct 08, 2015 2:03 pm 
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HOLY , that's some nice work and shooting . great job


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PostPosted: Thu Oct 08, 2015 4:32 pm 
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Quote:
. . . Bob's Boattail . . . placed 1st and 2nd in the 200 yard Pro Division. . . .

Wow!


Just; Wow!


Impressive; on so many fronts!

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PostPosted: Sat Oct 10, 2015 4:25 am 
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Location: Halifax, NS
Sweet gun but ... Helium is what is not being made any more.

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PostPosted: Sat Oct 10, 2015 1:15 pm 
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Very true, it escapes from our atmosphere at the rate of ~4 tons per day.... but which would you sooner see it used for, advancing airgunning or filling party balloons?....

Bob

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Dominion Marksman Silver Shield - 5890 x 6000 in 1976, and downhill ever since!
Airsonal; Too many! Springers, Pumpers, CO2, but I love my PCPs and developing them!
Proud Member of the 2000+fps Club!


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PostPosted: Sat Oct 10, 2015 1:42 pm 
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Location: P.G. B.C.
Amazingly good shooting! Well done, Bob.

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Daryl


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PostPosted: Sat Oct 10, 2015 5:27 pm 
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rsterne wrote:
Very true, it escapes from our atmosphere at the rate of ~4 tons per day.... but which would you sooner see it used for, advancing airgunning or filling party balloons?....

Bob



Infused in beer would be my choice...

https://www.youtube.com/watch?v=Vwo1J3QKrC8

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