My centerfire friends

Lynn, I'm glad you are comedian now. Mr. Myers does not imply that he is going to give us info, Mr. C does that and tells us to go fishing. Why does his spec rifles have adjustable weight devices and not a fixed weight as we are led to believe.

Butch
 
Transitional wave form analysis indicates supplementary nodes are known to cause transient doppler interference. The effect of this on bullet impact is unknown.
 
My friends

My friends:

Built two rifles.....exactly the same.....one barrel slugged so it wound up a half inch longer than the other....otherwise, identical....the same fellow bedded them...same stocks......etc...

Shooting off a hard rest system I sighted the first rifle in, had the muzzle device set at a place that has worked on several guns like these.....the thing was extremely flat, no vertical, going to be a killer, went to an ARA card....started shooting, I've always been kinda of a runner, and was punching the dot out then I'd get a 1:00 scratch 50 or one at 7:00.....more at 7:00...

I got to fooling around and started waiting between shots....started with 10 seconds.....worked much better, then 9 seconds and finally to seven then six.......it seemed if I would wait at least 8 seconds between shots this rifle would just cut the dots out......

So I would then shoot four rounds, waiting 8 seconds, usually center punched, then I'd quickly move to the fifth bull, find my spot and pull the trigger.....more than half the time I'd get a 50, either 1:00 or 7:00....more at 7:00.....

I moved the scope to the other rifle, ran the same test and got the exact same results, I mean identical......

At this time I really ain't sure what's causing this.....is the barrel still vibrating, or is it my rest system......I ain't sure yet....

See, I'm a pistol shooter and have always been a runner....with some success...but I'd always get an odd shot or two, or three on a card but I always figured it was because I'd sometimes not hit my spot .......but now I ain't sure............

Your friend, Bill Calfee
 
Back in 1956 I shot a friend's dad's light weight .270 Remington pump. I think it was a Model 760 but anyway, wherever it is, I'll bet that thing is still vibrating or at least quivering.:)

Now I know that this is a benchrest forum and that 270 was not a benchrest gun but some principles still apply.

With the exception of that 270 pump, go ahead and shoot after 15 or 20 seconds. The holdover quivering effect (HQE) will not effect you that much.

Concho Bill
 
Bill,
Try a Different Rest and repeat your test!

I have read some people say their rifle barrel only vibrates for 5 Sec or 3 sec or 15 sec etc.:confused:
Now please understand that I am just a poor uneducated city boy that’s not necessarily a betting man but I would be willing to bet one and all that their barrel is still vibrating after a minute and multiple shot vibrations are cumulative.:rolleyes:
That’s My Two Cents:)
 
I know that tapping on a barrel is not the same as shooting, but sliding a Sims Deresonator on a barrel sure makes the ring turn into a thump, sort of like putting your finger on one of the tines of a tuning fork.
 
Barrel could still be vibrating, after all the heavier the muzzle device the more the pendulum will keep swinging - just physics. More mass in motion, Harder to damp out. On the other hand - if it was in calm conditions, you might have been hitting the eddies from the last bullets wake. (No. I did not make that up.) Bullets leave wakes just like boats and planes, if there is no wind to disperse them the vortexes (vortices) will hang around for a while, like smoke rings. With any wind at all these get destroyed pretty quick, but indoors it can be an issue.
 
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