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280 Ackley Improved

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jbar2506 View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote jbar2506 Quote  Post ReplyReply Direct Link To This Post Topic: 280 Ackley Improved
    Posted: March/10/2009 at 07:10

I'm having a 280 Ackley Improved built.  26" Douglas Air Gauge barrel.  My question is, What twist?  9 or 10?

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Post Options Post Options   Thanks (0) Thanks(0)   Quote 300S&W Quote  Post ReplyReply Direct Link To This Post Posted: March/10/2009 at 08:13
  The general consensus I've seen has been for 1 in 9.  Here is one bbl makers recommendation on twist rates:http://www.eabco.com/TwistRate.htm
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jbar2506 View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote jbar2506 Quote  Post ReplyReply Direct Link To This Post Posted: March/10/2009 at 08:22
Great web site. Thanks so much.  Terrific info.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote 300S&W Quote  Post ReplyReply Direct Link To This Post Posted: March/10/2009 at 08:28
 NO PROBLEM!  If ya would,let us know how things are going with your rifle.  We LUV hands on input!
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Post Options Post Options   Thanks (0) Thanks(0)   Quote pyro6999 Quote  Post ReplyReply Direct Link To This Post Posted: March/10/2009 at 08:51
i would go with a 1 in 10 myself, more than likely your going to shoot bullets in weights from 140-160gr anyway. the 1:9 is for 150gr bullets and up only
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Roy Finn Quote  Post ReplyReply Direct Link To This Post Posted: March/10/2009 at 09:34
Of the two, I prefer the 1-10 as well.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Relentless Pursuit Quote  Post ReplyReply Direct Link To This Post Posted: March/10/2009 at 09:45
1-9" remains my default favorite twist rate,in anything 7mm. That from 7BR to STW. It'd be a grand misdirection to muse that a 1-9" isn't sinister with 100's on up.
 
My 1-9" 280AI.................
 
 
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Post Options Post Options   Thanks (0) Thanks(0)   Quote pyro6999 Quote  Post ReplyReply Direct Link To This Post Posted: March/10/2009 at 09:46
Originally posted by Relentless Pursuit Relentless Pursuit wrote:

1-9" remains my default favorite twist rate,in anything 7mm. That from 7BR to STW. It'd be a grand misdirection to muse that a 1-9" isn't sinister with 100's on up.
 
My 1-9" 280AI.................
 
 

im not in any place to argue with dan lilja, because thats what he recommends 1:10.
They call me "Boots"
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Relentless Pursuit Quote  Post ReplyReply Direct Link To This Post Posted: March/10/2009 at 09:51
Here's my only 1-10" .284",which do in fact happen to be a #6 contoured 22" Lilja,chambered 7-08. S/A 700,Badger M4,QRW's,3.5-10X M1 LR. Dan makes a fair tube,though I prefer others.
 
 
Couldn't formulate a reason not to go 1-9"....................(hint)
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Tip69 Quote  Post ReplyReply Direct Link To This Post Posted: March/10/2009 at 21:33
RP - what's with all the psycho stocks?  Maybe that's why I'm a Wood guy!
take em!
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Relentless Pursuit Quote  Post ReplyReply Direct Link To This Post Posted: March/11/2009 at 03:53
I shoot a bit and with an open mind,less qualm of running the gamut. Excellence interests me a great deal and noone does it better than McMillan.
 
Long ago,I cyphered that one can enthrall a Critter,via greater than subtle color matrix inundations. The curiousity subdues them and a guy can saunter right up to them and bang 10yd broadsides. Sorta like cheatin'.
 
I shot alotta blue for years,but it was too easy,so I mixed things up to add a challenge.
 
 
 
Bang some iron sights too,to keep sh*t fair.
 
 
Variety IS the spice of life.
 
 
 
Tools interest me more than eyecandy,though I'll wax nostalgic now and again,if only in fairness. Wood makes great fuel for the fireplace,but there isn't a lesser handle material.
 
 
I can suffer black and grey,but much prefer gelcoat over anyone's paint..
 
 
In retrospect,I guess I gotta side with my long term affliction with Pink,as an inside favorite.................
 
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Ed Connelly Quote  Post ReplyReply Direct Link To This Post Posted: March/11/2009 at 09:23
Yeah......I met Gale McMillan years ago in Phoenix in the eighties...............Sleep   So what else is new dude-man???     An internet blowhard............Boozer
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Post Options Post Options   Thanks (0) Thanks(0)   Quote jbar2506 Quote  Post ReplyReply Direct Link To This Post Posted: March/11/2009 at 11:52
Thanks everyone for your response on the 280AI twist question.  I'll be shooting mostly 140/150gr, occasionally 175gr.  Sounds like 9, or 10 twist will be okay.
Thanks again.
jbar
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Post Options Post Options   Thanks (0) Thanks(0)   Quote sakomato Quote  Post ReplyReply Direct Link To This Post Posted: March/11/2009 at 21:29
I would go for a 1 in 9 or a 1 in 8.  My Hart barreled 280AI has a 1 in 8 because I wanted to shoot the 160 gr Accubond as my main bullet.  However it shoots the 140's and 150's equally well.
 
With today's tendency to make long bearing surface monometal bullets like the TSX or the E-Tip then a tighter twist might be what you want.  If you get a 1 in 10 and discover that it won't shoot the 150 gr E-Tip or the 160 gr TSX as well as you would like, then you have no options.
Guns only have 2 enemies, rust and politicians
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Magnum Opus Quote  Post ReplyReply Direct Link To This Post Posted: March/15/2009 at 04:44
You have to look long and hard for a Factory 7mm,that isn't 9" or 9" and modest change.
 
Hint................. 
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