.243 Ackley Improved
- Thread starter Atkins
- Start date
CatShooter
New member
It is a chamber that will accept a factory cartridge, but when fired, the fired case comes out larger - usually with a straighter body, and a 40 degree shoulder.
Reloading the fired case will allow you a larger amount of powder for higher velocities.
The fired case will no longer fit into a standard chamber.
.
Reloading the fired case will allow you a larger amount of powder for higher velocities.
The fired case will no longer fit into a standard chamber.
.
ColoradoOsprey
New member
EDIT (somebody is a faster finger typer)
Most wildcat catridges are names for their inventer.
Ackley is an improved version of a standard 243 with a different shoulder angle to increase powder capacity allowing the cartridge to be driven to a higher velocity.
If you would like the specs... let me know.
The nice thing about Ackley's designs is that you can still shoot standard 243 Win ammo through them (without the performance gain) if you get in a pinch and can't reload for the gun.
Most wildcat catridges are names for their inventer.
Ackley is an improved version of a standard 243 with a different shoulder angle to increase powder capacity allowing the cartridge to be driven to a higher velocity.
If you would like the specs... let me know.
The nice thing about Ackley's designs is that you can still shoot standard 243 Win ammo through them (without the performance gain) if you get in a pinch and can't reload for the gun.
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Ridge Runner
New member
ackley improved, is a chamber cut as to remove most of the body taper and changing the shoulder angle to 35 or 40 degrees.
Generaly at the same pressure level they develope 2-3% more velocity with 8-9% more powder.
The benefit of an ackley chamber is the sharp shoulder does impede the flow of brass causing less trimming, however, the minimal body taper and the sharp shoulder do make it harder and sometimes impossible to detect signs of excessive pressure, itsa not uncommon for the first pressure sign that you see to be a primer pocket that will not hold the primer due to excessive casehead expansion.
RR
Generaly at the same pressure level they develope 2-3% more velocity with 8-9% more powder.
The benefit of an ackley chamber is the sharp shoulder does impede the flow of brass causing less trimming, however, the minimal body taper and the sharp shoulder do make it harder and sometimes impossible to detect signs of excessive pressure, itsa not uncommon for the first pressure sign that you see to be a primer pocket that will not hold the primer due to excessive casehead expansion.
RR
Ridge Runner
New member
well case life is much better, and yes its a simple rechamber job
RR
RR
The 243AI is only a handload option. All of the AI's except for the 280AI have to be handloaded.No factory ammo available.
I am in the process right now of doing one up on a 700 action. I really like the performance gain as well as the extended brass life. Nothing like pushing a 85gr TSX at 3400 or 3500 fps with hardly no recoil.
Tim
I am in the process right now of doing one up on a 700 action. I really like the performance gain as well as the extended brass life. Nothing like pushing a 85gr TSX at 3400 or 3500 fps with hardly no recoil.
Tim
brdeano
New member
Tim, what are the specs on the rifle your building? I too, am in the process of putting a 243AI together, should have it in a couple months. Mine is on a Rem 700, Manners T2, Rock 1-8" twist Rem Varmint contour w/Heavy flutes, will finish at 24". Just waiting on Rock for the barrel, everything else is in hand. I'll be running the 105Amax at 3100-3200 in this rifle. I'll likely slip a few 75Vmax's into woodchucks and a few 85TSX's into whitetails...should be fun. /ubbthreads/images/graemlins/grinning-smiley-003.gif
A buddy has a 243AI build to the same specs I mention above, he nets 3800+ on w/75's, and 3200 w/105's...the rifle is a little hammer, that's for sure.
A buddy has a 243AI build to the same specs I mention above, he nets 3800+ on w/75's, and 3200 w/105's...the rifle is a little hammer, that's for sure.
Looks like you are much further along in the process then I am. I have the action (Rem 700 SS SA),stock and scope but havent decided on a Barrel yet. I do want to go Heavy/Varmint contour,overall length 22 or 24" long, twist somewhere in the 1-8 to 1-9" range, but maker is still to be determined.
Maybe I'll just steal your specs and get it over with huh? /ubbthreads/images/graemlins/smile.gif
Sounds like yours is gonna be a BA rig when its done.
Tim
Maybe I'll just steal your specs and get it over with huh? /ubbthreads/images/graemlins/smile.gif
Sounds like yours is gonna be a BA rig when its done.
Tim
Bluedog
New member
Quote:
It is a chamber that will accept a factory cartridge, but when fired, the fired case comes out larger - usually with a straighter body, and a 40 degree shoulder.
Reloading the fired case will allow you a larger amount of powder for higher velocities.
The fired case will no longer fit into a standard chamber.
I am thinkin this guy had to be in the military...clear concise, and to the point! /ubbthreads/images/graemlins/grinning-smiley-003.gif
It is a chamber that will accept a factory cartridge, but when fired, the fired case comes out larger - usually with a straighter body, and a 40 degree shoulder.
Reloading the fired case will allow you a larger amount of powder for higher velocities.
The fired case will no longer fit into a standard chamber.
I am thinkin this guy had to be in the military...clear concise, and to the point! /ubbthreads/images/graemlins/grinning-smiley-003.gif
Quote:
It is a chamber that will accept a factory cartridge, but when fired, the fired case comes out larger - usually with a straighter body, and a 40 degree shoulder.
Reloading the fired case will allow you a larger amount of powder for higher velocities.
The fired case will no longer fit into a standard chamber.
.
How exactly does the fired cartridge come out larger? /ubbthreads/images/graemlins/confused1.gif
It is a chamber that will accept a factory cartridge, but when fired, the fired case comes out larger - usually with a straighter body, and a 40 degree shoulder.
Reloading the fired case will allow you a larger amount of powder for higher velocities.
The fired case will no longer fit into a standard chamber.
.
How exactly does the fired cartridge come out larger? /ubbthreads/images/graemlins/confused1.gif
Ok. Maybe I misunderstood. Does a standard cartridge go in to the ai chamber, and then after firing, it comes out as an ai improved. Does the shoulder actually change in the chamber?
Other than the result of less powder meaning slower speed, is there any problem with shooting a standard round through an improved chamber?
Other than the result of less powder meaning slower speed, is there any problem with shooting a standard round through an improved chamber?
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Quote:
Ok. Maybe I misunderstood. Does a standard cartridge go in to the ai chamber, and then after firing, it comes out as an ai improved. Does the shoulder actually change in the chamber?
Other than the result of less powder meaning slower speed, is there any problem with shooting a standard round through an improved chamber?
You are correct, the old shell comes out as a AI shell.The force of the explosion pushes the brass out to the size of the chamber. this is called "FIRE FORMING" your brass.
And no on the second part.There is nothing wrong with shooting regular 243 Win ammo in a 243AI chambered rifle.
Ok. Maybe I misunderstood. Does a standard cartridge go in to the ai chamber, and then after firing, it comes out as an ai improved. Does the shoulder actually change in the chamber?
Other than the result of less powder meaning slower speed, is there any problem with shooting a standard round through an improved chamber?
You are correct, the old shell comes out as a AI shell.The force of the explosion pushes the brass out to the size of the chamber. this is called "FIRE FORMING" your brass.
And no on the second part.There is nothing wrong with shooting regular 243 Win ammo in a 243AI chambered rifle.
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