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Author Topic: question for the gun gurus  (Read 82 times)

Online notsams

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question for the gun gurus
« on: February 04, 2019, 08:12:54 PM »
    A guy at work just put together a AR15 in 224 Valkrie. 1 in 7 twist shooting 90 gr factory Federal Fusion bullets. He said he shoots a 2.5 inch group at 100 yards but shoots 1.5 inch groups at 150 yards and the groups should get better even at 200 yards because the bullets are not stabilized at 100 yards but stabilize after 100 yards and tighten up the groups. I know what I think but what do you guys think about this?

Offline sundowner

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Re: question for the gun gurus
« Reply #1 on: February 04, 2019, 08:55:00 PM »
I would question the 100 yard groups , is he using the same setup for all the shoots 100 , 200 , the bullet should be spinning faster at 100 yards .  ##$%#1118  If what he's saying is true the holes at 100 yards should not be round they should be oblong .
« Last Edit: February 04, 2019, 08:56:58 PM by sundowner »
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Online Madgomer

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Re: question for the gun gurus
« Reply #2 on: February 04, 2019, 09:07:58 PM »
I expect Dutch or PH may have some true wisdom on this but based on what you're hearing from your coworker I have to ask if he's into the medical marijuana. I just can't picture the physics of how a pill can get more stable and create tighter groups after leaving the barrel and moving downrange.  Too many factors outside of the muzzle trying to open up the groups.
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Offline Dutch-Hunter

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Re: question for the gun gurus
« Reply #3 on: February 05, 2019, 03:48:26 PM »
I do not think initially this is a stability situation. Is he shooting off hand or off rest? I have seen a tendency to concentrate more on distance shots. I think itís a shooter problem more than a stability one. The 224 Valkyrie 90 gr Fusion rapidly drops in trajectory after 300 yards. With an average muzzle velocity of 3700 FPS it should stabilize quickly. I also believe it severely runs out of punch at 500. Maybe good for thin skinned small sized game at this distance. Medium sized game shots should be limited to 200 or less IMO.

In my 50 years of lead launching I can only remember one instance of short range instability. It was a low velocity flat base scenario. Typically if stability is not achieved within 50 yards its never going to stabilize.
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Online notsams

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Re: question for the gun gurus
« Reply #4 on: February 05, 2019, 06:58:25 PM »
     The guy has only had the rifle for a week. He said he is an excellent shot and wont shoot un less the crosshairs are exactly were he wants them . He said he was using a very steady rest for all his shooting.       This is the same guy that lodged the bullet in his .243 last winter. He drilled a hole through the bullet in order to get it out and then fired the rifle and blew a primer.

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Re: question for the gun gurus
« Reply #5 on: February 05, 2019, 07:01:29 PM »
Enough said
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Offline sundowner

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Re: question for the gun gurus
« Reply #6 on: February 06, 2019, 03:47:42 PM »
Dido . ##$%#1118
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