Weight of Ai at with 16" barrel?
- Thread starter jeffl838
- Start date
Yea lightweight and AI are typically not found together. My primary setup is my AT with a 24" heavy Palma 6.5 Creed barrel, ultra 7 suppressor, atlas bipod with spigot mount and a Bushnell ERS. This comes in at 18.25 pounds or so. They mass of the action sets the weight farther back and makes the rifle handle surprisingly well.
Yeah, but the AI is way more reliable than that finicky bitch 249; and the mags stay in (unlike those f-ing plastic drums that always fell off at the most inconvenient time),
Ok, so I did a bit of math for you, given an estimate of steel density found on the web. Apparently, steel- depending upon alloy- has a typical density between 4.48 and 4.65 ounces per cubic inch. A 1" long section of 1" diameter cylindrical steel with a 308 cal bore weights ~ 3.2 oz. A 1" long section of 0.75" cylindrical steel with a 308 cal bore weighs ~ 1.7 oz
Also online, I found that...
a medium palma barrel tapers from 0.92" to 0.82" over a length of 24.5". 30 inch barrel
a heavy palma barrel tapers from 1" to 0.9" over a length of 24.5". 30 inch barrel
an M24 barrel tapers from 1.2" to 0.9" over a length of 23". 26 inch barrel
http://precisionrifleblog.com/2014/11/18/rifle-barrels-what-the-pros-use/
To get to a 16" barrel you would need to cut 14" from the palma barrels and 10" from the M24 barrel.
This would remove
~ 31.5 oz from the med palma barrel
~ 39 oz from the heavy palma barrel
~ 30oz from the M24 barrel
The weights given in the article for the barrels are 5.35, 6.5, and 7 lbs respectively so you could expect (given no reprofiling of the barrel after cutting)...
a med palma barrel- cut to 16"- to weight 3.4 lbs
a heavy palma barrel- cut to 16"- to weight 4 lbs
an M24 contour barrel- cut to 16"- to weight 5.1 lbs
Given the specific example of a 26" med palma barrel cut down to 16"- you can expect a weight reduction of ~ 1.4 lbs.
If you can give me the diameter of YOUR barrel at the muzzle and at the proposed cut site, I can give you an estimate of the weight reduction within a couple of oz.
Just for reference...
volume of a cylinder = PI * (r^2) * h
volume of a tapered cylinder = (1/3) * PI * ((r1^2) + (r1*r2) + (r2^2)) * h
Further, I assumed that cutting the grooves removes (1/2) of the available material such that the void volume of the bore =
(PI * (0.300^2) * h) + (((PI * (.308^2) * h) - (PI * (0.300^2) * h)) / 2) where h = the length of the barrel section removed.
Also online, I found that...
a medium palma barrel tapers from 0.92" to 0.82" over a length of 24.5". 30 inch barrel
a heavy palma barrel tapers from 1" to 0.9" over a length of 24.5". 30 inch barrel
an M24 barrel tapers from 1.2" to 0.9" over a length of 23". 26 inch barrel
http://precisionrifleblog.com/2014/11/18/rifle-barrels-what-the-pros-use/
To get to a 16" barrel you would need to cut 14" from the palma barrels and 10" from the M24 barrel.
This would remove
~ 31.5 oz from the med palma barrel
~ 39 oz from the heavy palma barrel
~ 30oz from the M24 barrel
The weights given in the article for the barrels are 5.35, 6.5, and 7 lbs respectively so you could expect (given no reprofiling of the barrel after cutting)...
a med palma barrel- cut to 16"- to weight 3.4 lbs
a heavy palma barrel- cut to 16"- to weight 4 lbs
an M24 contour barrel- cut to 16"- to weight 5.1 lbs
Given the specific example of a 26" med palma barrel cut down to 16"- you can expect a weight reduction of ~ 1.4 lbs.
If you can give me the diameter of YOUR barrel at the muzzle and at the proposed cut site, I can give you an estimate of the weight reduction within a couple of oz.
Just for reference...
volume of a cylinder = PI * (r^2) * h
volume of a tapered cylinder = (1/3) * PI * ((r1^2) + (r1*r2) + (r2^2)) * h
Further, I assumed that cutting the grooves removes (1/2) of the available material such that the void volume of the bore =
(PI * (0.300^2) * h) + (((PI * (.308^2) * h) - (PI * (0.300^2) * h)) / 2) where h = the length of the barrel section removed.
Even with a 16" standard barrel an AI will be heavy, but that is not necessarily a bad thing. You may want to check out going with a 16" Proof or Hardy carbon fiber wrapped barrel. Ounces=pounds when it comes to precision rifles if you are humping them all day. AIs are amazing rifles and unless you are toting it through the woods all day the weight should not be an issue. Good luck.
