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Baffled?

 
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  #1  
Old 07-02-2013, 09:06 AM
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Baffled?

So, my BIL shoots a 300 RUM. I shoot a 6.5-284. We generally always go to the range together. Both of our rifles are threaded to shoot suppressed. My suppressor is the 338 variety so that I can use it on any weapon. I have no problems on my rifle. On his there are baffle strikes near the end of the suppressor on every shot.
I take it off and put if on my other buddy's rifle (.308) and he has no trouble, shoots clean. Put it back on the RUM and it strikes again.
So, its obvious to me that his threads are off....right?
I take the rifle to our smith. He puts it on the dial indicator and says its within tolerance.
At this point I am left with 2 other thoughts: My smith is full of bs or he has a pressure problem.
He is shooting an Obermeyer undersized bore. Could this have anything to do with it?? Has anyone experienced this?
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  #2  
Old 07-02-2013, 10:04 AM
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Re: Baffled?

check the crown
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  #3  
Old 07-02-2013, 01:33 PM
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Re: Baffled?

I wonder if it could be a bullet stability/yaw issue. Is your BIL shooting light bullets in a fast twist or heavy bullets in a slow twist? Either situation could conceivably cause some bullet yaw, which might account for the strikes.
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Old 07-02-2013, 03:09 PM
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Re: Baffled?

He's shooting 210 Bergers in a 1:11 twist. Sound right?
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Old 07-02-2013, 03:19 PM
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Re: Baffled?

11tw should be fine.

check the crown

change seating debth

try another bullet as gun may not like the Berger? (unlikely)

if you're running them at max payload? slow them down?

i assume you are running retumbo- H1000 or similar burn rate powder?
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Old 07-02-2013, 03:24 PM
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Re: Baffled?

Thanks for all the advice.
Yes, Retumbo and close to max load.
What should I be looking for in the crown?
FYI, with suppressor off this rifle is 1/4-1/2 moa at 3145 fps.
I just kicks like a mule and sounds like cannon... haha
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Old 07-02-2013, 10:04 PM
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Re: Baffled?

Quote:
Originally Posted by Time Killer View Post
He's shooting 210 Bergers in a 1:11 twist. Sound right?
Sounds perfect. That pretty much blows my theory up. I think I need an emoticon for headscratching...
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