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.243 rebarrel

 
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  #1  
Old 03-16-2005, 04:33 PM
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.243 rebarrel

I trying to decide whether or not to have my .243 rebarreled in std. 243 or go to the .243ai. I would like to hear from those of you that have done this or have owned both. Is it a simple fireform to the new dimensions? thanks ,Jim
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Old 03-16-2005, 06:30 PM
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Re: .243 rebarrel

Jimm,

I have do not own either at this time but I have built several 243 AIs for customers and like the other AI rounds, they are about the easiest wildcats to load for.

Basically take a mid-upper level load in the parent 243 and load and shoot, easy as that. A properly set up rifle chambered for an AI round should deliever 1/2 moa grouping or slightly better with fireforming loads making them totally suitable for field use, even varminting.

As far as performance goes, the AI rounds based on the 308 family of case will not produce the increased velocity as say a 22-250 AI would or a 257 Roberts AI compared to their parent cases.

THis is because the 308 case is built to pretty minimum taper as is for a factory round and case capacity is not as dramatic as some AI rounds.

Still you will generally get at least 100 fps over the 243 plus your brass will last longer in the AI chamber as the sharp shoulder will limit case stretching.

Its a heck of a little round. Fireforming is extremely easy.

Good Shooting!!

Kirby Allen(50)
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Kirby Allen(50)

Allen Precision Shooting
Home of the Allen Magnum, Allen Xpress and Allen Tactical Wildcats and the Painkiller Muzzle brakes.

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Web Page: www.apsrifles.com

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  #3  
Old 03-17-2005, 07:27 AM
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Re: .243 rebarrel

Jimm,
Go for it! Having abandoned my 6mm AI project, as i posted previously its just to expensive, i have decided to re-barrel my 243 remmy PSS to 243 Ackley.
I shoot mainly 90grn Scenars in the 243 and will stick with this bullet for the Ackley, thus i am going to have a 1-9 twist, 28" long in straight HV taper

I'll keep you posted to how its going and would be gratefull if you would do likewise. [img]/ubbthreads/images/graemlins/smile.gif[/img]

Ian.
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Old 03-17-2005, 08:27 AM
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Re: .243 rebarrel

I am thinking of rebarreling by 243 with a 6-284 bbl. Gives much better performance with the heavier bullets and doesn't use all that much more powder. Anything in the 6mm caliber gives great versatility.
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Old 03-17-2005, 05:14 PM
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Re: .243 rebarrel

Thanks Kirby, Are you saying the initial fireform loads will have half moa accuracy?I will probably use 85 gr. to 107gr bullets , what in your experience would be a good twist rate?Would 1 in 8 be to fast for the 85's? Thanks again,Jim
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Old 03-17-2005, 05:19 PM
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Re: .243 rebarrel

Hey Centrepunch,I will definitely keep you posted. What is the bc of the 90 scenars? I would'nt think it would be as high as the 107 sierra matchkings.Have you ever used or considered them?
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Old 03-18-2005, 12:21 AM
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Re: .243 rebarrel

Jimm,

For the 243 AI with the 107 gr Smk you will need the 1-8" twist. This would probably work fine with the 85 gr pills as well. You would have no problem at all with the Ballistic Tip family of bullets as they will handle any twist rate at these velocities.

For a conventional cup jacketed bullet you may see some problem with bullet integrity failures.

A properly chambered AI rifle will shoot in the 1/2 moa range with fireforming loads given it is a quality rifle to begin with. If you take a factory 243 and rechamber it you will probably not get this level of consistancy with fireforming loads but in a properly machined match barrel, this is fairly easy to get.

Good Shooting!!

Kirby Allen(50)
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Kirby Allen(50)

Allen Precision Shooting
Home of the Allen Magnum, Allen Xpress and Allen Tactical Wildcats and the Painkiller Muzzle brakes.

Farther, Faster and Flatter then ever before.

Web Page: www.apsrifles.com

allenmagnum@gmail.com
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