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Posted: 8/21/2010 9:49:41 AM EDT
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I just got my 300/221 put together, and have started working on loading for it. I don't own a suppressor for it yet, but have a YHM 762 QD on order.
Before I throw a whole pile of 240gr SMK'$ down range looking for an accurate subsonic load, how much will a suppressor change my accuracy? What effect have you seen on groups suppressed vs un-suppressed? |
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Quoted:
I just got my 300/221 put together, and have started working on loading for it. I don't own a suppressor for it yet, but have a YHM 762 QD on order. Before I throw a whole pile of 240gr SMK'$ down range looking for an accurate subsonic load, how much will a suppressor change my accuracy? What effect have you seen on groups suppressed vs un-suppressed? My suppressor increased the accuracy of my AR10 but only slightly. POI shift is 1.25 MOA low with the can. Subsonics are totally different. Make sure you can stabilize the bullet before putting your can on and finding out what a baffle strike sounds like. |
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Has anyone noticed a substantial drop as the barrel heats up more? Shooting a SWR Wolverine off my 16" Bushmaster M4 style upper. Seems to be fairly accurate when cold, but after putting through a few mags, the POI really starts dropping, bad.
I'm thinking of getting a 16" HBAR, possibly fluted (might help with rigidity?) |
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Quoted:
Has anyone noticed a substantial drop as the barrel heats up more? Shooting a SWR Wolverine off my 16" Bushmaster M4 style upper. Seems to be fairly accurate when cold, but after putting through a few mags, the POI really starts dropping, bad. I'm thinking of getting a 16" HBAR, possibly fluted (might help with rigidity?) My POI shifts downward by 1-1.5 inches [@100yds] after about 20 rounds. I have a 16" govt profile carbine barrel. My guess is that at temperature, the barrel isn't as rigid as a cold barrel; it's not that the barrel is drooping, but more like the barrel isn't rising as much as with a cold, more rigid barrel. I don't have any problems compensating for this; it's very consistent. I figure that if I have to put 60 rounds through my carbine in short order, 2 MOA precision is no longer a prime concern. |
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Quoted:
Quoted:
Has anyone noticed a substantial drop as the barrel heats up more? Shooting a SWR Wolverine off my 16" Bushmaster M4 style upper. Seems to be fairly accurate when cold, but after putting through a few mags, the POI really starts dropping, bad. I'm thinking of getting a 16" HBAR, possibly fluted (might help with rigidity?) My POI shifts downward by 1-1.5 inches [@100yds] after about 20 rounds. I have a 16" govt profile carbine barrel. My guess is that at temperature, the barrel isn't as rigid as a cold barrel; it's not that the barrel is drooping, but more like the barrel isn't rising as much as with a cold, more rigid barrel. I don't have any problems compensating for this; it's very consistent. I figure that if I have to put 60 rounds through my carbine in short order, 2 MOA precision is no longer a prime concern. Mine comes down enough at 100 yards that I'm hitting dirt. 
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Quoted:
Any time you put weight on the end of a barrel, it will change POI. Not the fault of the can, just the weight. And the Wolverine is a heavy can, I'm not disputing that weight added to the end of the barrel causes a change to the POI. I'm asking if anyone else has a large drop on their POI? Seems like most are saying 1-2", however, I'm getting much much worse than that and I'm just wondering if I'm the only one. I suppose you are answering Bgu301's post though, might help a little if you quote it. |
| Not a firm rule, but it seems the longer the barrel and if you run a thin barrel. You will have greater POI shift. I have gone to heavy 18in-20in barrels and have seen much less POI shift. All rifles are less than .75 MOA shift at 100 yrds. Your mileage may vary. All cans are AAC. |
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