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  #1  
Old 11-17-2011, 12:37 AM
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H&R Pressure's


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If the H&R will handle the pressures from the 270 Win, 280 Rem, and 30-06 then wouldn't it be o.k.. with the 280AI 40 degree's. The Max pressure for the 22-250 is 65,000 psi according to the SAAMI. Thank you guys for your help !!
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Old 11-17-2011, 03:48 AM
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No direct experience here, but one of the effects of Ackley's improvement designs is to reduce rearward thrust against the bolt or breech face. Could be important here. I would suggest you post the same inquiry on "go2gbo.com" in the NEF forums, there is more info there than you can ever use. Goatwhiskers
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Old 11-17-2011, 03:52 AM
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yea I read all the preasure issues wirh the tomson ecore also
yes the 270 is ok with its max 65,000 yet they say some with the same preasure is to much
now I do know that most 270 loads don't reach that maximun but I was still lost.
I will start a bit low and build my way up looking for signs of preasure
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Old 11-17-2011, 10:22 AM
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I do not think the pressure would be any different for an AI cartridge over a standard cartridge.A brass case is a brass case and an action is an action.Improving the case does not make it stronger.As mentioned it may have an effecrt on rearward thrust and give a bit more powder space.As a general rule more powder more velocity,same pressure.
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Old 11-17-2011, 11:54 AM
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The 280 Improved will work fine in the H&R, I get just under 3200fps with the 140gr TSX w/RL22 in mine, be aware it won't be a true Ackley that will work with factory ammo tho since the barrel can't be set back as is done on a threaded barrel. Fire forming requires either loading with bullets seated so they chamber hard into the lands, or by forming a false shoulder to headspace on.
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  #6  
Old 11-20-2011, 11:53 AM
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The difference between the .280 and the .280AI is so little that the 'Improved' is not worth the work and expense. Nothing you shoot will be able to notice the difference.
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  #7  
Old 11-20-2011, 09:03 PM
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Bagtic +1.

Not sure what your question is? Seems you are concerned with the strength of the H&R action?? If so working up slow will not tell you by looking for pressure signs. The pressure signs people are looking for are the brass over pressure. If the action is over presure, it just ruptures instantanously.

H&R actions have been around for 50+ years, many different owners and metal quality used. If the rifle is chamberd for a cartridge it will probably handle that. It is not the style/design of action I'd think of 'hot rodding". Get a two lug turn bolt action.
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Old 11-21-2011, 01:16 AM
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Quote:
Originally Posted by BAGTIC View Post
The difference between the .280 and the .280AI is so little that the 'Improved' is not worth the work and expense. Nothing you shoot will be able to notice the difference.
The difference between the 280 and 280AI may be nominal and not worth additional expense to you, but the COOL factor is absolutely worth it, to some. Do you realize how little effort is required to go from the standard 280 to the AI version?

There is a gentleman by the name of Kenny Jarrett who builds some astoundingly accurate hunting rifles. He favors the 280AI. Nosler thought so much of it that their very fine custom rifle is offered in it, as a standard chambering.

Truth be told, there is little enough difference between the majority of cartridges to justify their existence...yet exist, they do! The 280AI is knocking on the door of 7RM performance with bullets of 160 grains or less. Is that not worth a little more effort and expense?
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Old 11-21-2011, 07:47 AM
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Sorry I forgot the "cool factor". I guess that is why I carry a shoot the same bullets as the 280AI from my 275 Rigby!!! More cool!!
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Old 11-23-2011, 10:15 PM
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Yeah the Nosler stuff is one of the reasons I'm looking at it, they have a 3rd load coming out pretty soon with the 150gr E-Tip. It is a really neat round to me and I don't know why but as far back in my life as I can remember I've had a need for speed. I love the stuff that goes over 3000 fps at the muzzle and I've driven a motorcycle faster than a car. Maybe I shouldn't admit that because there are plenty of things important about each round but it's one of the things I look at. The strength of the action is one of the things I was talking about though. It is a cool round !
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