.22 ILARCO - Revision history

Admin: /* Alternate Names */

2021-04-03T05:15:33Z

Alternate Names

Admin at 05:12, 3 April 2021

2021-04-03T05:12:03Z

Admin at 04:51, 3 April 2021

2021-04-03T04:51:24Z

Admin at 03:18, 3 April 2021

2021-04-03T03:18:02Z

Admin: Created page with "The '''.22 ILARCO''', also referred to as the '''.22 Winchester Short Magnum Rimfire''' or '''.22 American''' was an experimental rimfire cartridge developed by Winchester in..."

2021-04-03T02:58:22Z

Created page with "The '''.22 ILARCO''', also referred to as the '''.22 Winchester Short Magnum Rimfire''' or '''.22 American''' was an experimental rimfire cartridge developed by Winchester in..."

New page

The '''.22 ILARCO''', also referred to as the '''.22 Winchester Short Magnum Rimfire''' or '''.22 American''' was an experimental rimfire cartridge developed by Winchester in 1987 for the [[American-180]] submachine gun. At the time of development, the American-180 design was taken over by [[Illinois Arms Company]], resulting in the name ".22 ILARCO", but as was noted above, it is known by a number of other names as well.

== Development & Failure ==

Following [[Illinois Arms Company]]'s purchase for the rights to the American-180, they believed that a more powerful cartridge than the .22 Long Rifle would be a better fit for the gun, especially when marketing to law enforcement agencies and other organizations.

According to "Aaron" in a [https://forum.cartridgecollectors.org/t/more-tiny-rimfires-and-sub-caliber-wildcat-rimfires/7602/10 thread at the Cartridge Collectors Forum from 2010]:

"It is basically a hot-loaded .22 Long Rifle round, with the heavier bullet of the .22 Winchester Magnum Rimfire round and a strengthened .22 Long Rifle case with much more propellant. This was done to increase the power of the American-180, which could not chamber the longer .22 Winchester Magnum Rimfire round, without having to redesign the action and magazines. The power is almost the same as that of the .22 Winchester Magnum Rimfire. The .22 ILARCO round never went into large-scale production, and the sale of the American-180 patent ensured this. The .22 ILARCO is now a collector’s item.

== Ballistic Performance ==

Frank Barnes notes in his book [[Cartridges of the World]] (specifically the 16th edition), that the round utilizes a 40 grain FMJ bullet, an unspecified amount of "FL" powder, and achieves a muzzle velocity of 1.350 feet per second for 160 ft lbs of energy. This is apparently Winchester's factory load. Although the information provided by "Aaron" in the section above claims that this cartridge achieves similar performance as the [[.22 Magnum]], this doesn't appear to be the case. In fact, Winchester's factory loading is actually weaker than modern high-powered .22 Long Rifle loadings such as the [[CCI Velocitor]]...

{| class="wikitable"
|-
! Bullet Weight / Type !! Powder Type / Amount !! Velocity !! Muzzle Energy
|-
| 40 Gr. FMJ || "FL" - Unknown amount || 1,350 fps || 160 ft lbs
|}

[[Category: Wildcat Cartridges]]

@@ Line 51: / Line 51: @@
 * ".22 SM" (SM for "Short Magnum")
 * ".22 WMR Short (from [[Cartridges of the World]], 14th Ed.)
-* ".22 Winchester Magnum Rimfire Short"
+* ".22 Winchester Magnum Rimfire Short" (Cartridges of the World)
 * ".22 Winchester Short Magnum Rimfire"
 [[Category: Wildcat Cartridges]]

← Older revision		Revision as of 05:12, 3 April 2021
Line 1:		Line 1:
		+	[[File:22-Ilarco-22-American-22-Magnum-WMR-22-LR-Cartridge-Comparison-Firearmwiki-Firearm-Wiki.jpg\|frame\|right\|A cartridge comparison between the '''.22 ILARCO''' (two middle cartridges), the [[.22 Magnum]] parent cartridge (left), and a [[.22 Long Rifle]] round w/ lead round nose bullet (right). Photo by AaronN322 on the [https://www.gunandgame.com/threads/what-is-the-wierdest-rarest-cartridges-you-own.119615/page-4 Gun & Game forum].]]
		+
	The '''.22 ILARCO''', also referred to as the '''.22 Winchester Short Magnum Rimfire''' or '''.22 American''' was an experimental rimfire cartridge developed by Winchester in 1987 for the [[American-180]] submachine gun. At the time of development, the American-180 design was taken over by [[Illinois Arms Company]], resulting in the name ".22 ILARCO", but as was noted above, it is known by a number of other names as well. The cartridge never actually caught on, and production totally ceased upon Illinois Arms Company being bought by [[Feather Industries]] of Boulder, Colorado.		The '''.22 ILARCO''', also referred to as the '''.22 Winchester Short Magnum Rimfire''' or '''.22 American''' was an experimental rimfire cartridge developed by Winchester in 1987 for the [[American-180]] submachine gun. At the time of development, the American-180 design was taken over by [[Illinois Arms Company]], resulting in the name ".22 ILARCO", but as was noted above, it is known by a number of other names as well. The cartridge never actually caught on, and production totally ceased upon Illinois Arms Company being bought by [[Feather Industries]] of Boulder, Colorado.

@@ Line 1: / Line 1: @@
-The '''.22 ILARCO''', also referred to as the '''.22 Winchester Short Magnum Rimfire''' or '''.22 American''' was an experimental rimfire cartridge developed by Winchester in 1987 for the [[American-180]] submachine gun. At the time of development, the American-180 design was taken over by [[Illinois Arms Company]], resulting in the name ".22 ILARCO", but as was noted above, it is known by a number of other names as well. The cartridge never actually caught on, and production totally ceased upon
+The '''.22 ILARCO''', also referred to as the '''.22 Winchester Short Magnum Rimfire''' or '''.22 American''' was an experimental rimfire cartridge developed by Winchester in 1987 for the [[American-180]] submachine gun. At the time of development, the American-180 design was taken over by [[Illinois Arms Company]], resulting in the name ".22 ILARCO", but as was noted above, it is known by a number of other names as well. The cartridge never actually caught on, and production totally ceased upon Illinois Arms Company being bought by [[Feather Industries]] of Boulder, Colorado.
 == Development & Failure ==
@@ Line 30: / Line 30: @@
 == Specifications ==
-Parent case	.22 WMR
+* '''Parent case:''' .22 WMR
-Bullet diameter	.224 in (5.7 mm)
+*'''Bullet diameter:''' .224 in (5.7 mm)
-Neck diameter	.242 in (6.1 mm)
+*'''Neck diameter:''' .242 in (6.1 mm)
-Base diameter	.242 in (6.1 mm)
+*'''Base diameter:''' .242 in (6.1 mm)
-Rim diameter	.294 in (7.5 mm)
+*'''Rim diameter:''' .294 in (7.5 mm)
-Rim thickness	.050 in (1.3 mm)
+*'''Rim thickness:''' .050 in (1.3 mm)
-Case length	.669 in (17.0 mm)
+*'''Case length:''' .669 in (17.0 mm)
-Overall length	0.950 in (24.1 mm)
+*'''Overall length:''' 0.950 in (24.1 mm)
-Primer type	Rimfire
+*'''Primer type:''' Rimfire
 == Alternate Names ==
-The cartridge seems to be referred to by many different names, so hopefully we've covered all of them here:
+The cartridge seems to be referred to by many different names by various sources, so hopefully we've covered most or all of them below:
-* ".22 ILARCO"
+* ".22 American" (named for "American Arms", the original company making the American-180)
-* ".22 W
+* ".22 ILARCO" (for "Illinois Arms Company", who bought American Arms and the American-180 patents)
 [[Category: Wildcat Cartridges]]

@@ Line 1: / Line 1: @@
-The '''.22 ILARCO''', also referred to as the '''.22 Winchester Short Magnum Rimfire''' or '''.22 American''' was an experimental rimfire cartridge developed by Winchester in 1987 for the [[American-180]] submachine gun. At the time of development, the American-180 design was taken over by [[Illinois Arms Company]], resulting in the name ".22 ILARCO", but as was noted above, it is known by a number of other names as well.
+The '''.22 ILARCO''', also referred to as the '''.22 Winchester Short Magnum Rimfire''' or '''.22 American''' was an experimental rimfire cartridge developed by Winchester in 1987 for the [[American-180]] submachine gun. At the time of development, the American-180 design was taken over by [[Illinois Arms Company]], resulting in the name ".22 ILARCO", but as was noted above, it is known by a number of other names as well. The cartridge never actually caught on, and production totally ceased upon
 == Development & Failure ==
 Following [[Illinois Arms Company]]'s purchase for the rights to the American-180, they believed that a more powerful cartridge than the .22 Long Rifle would be a better fit for the gun, especially when marketing to law enforcement agencies and other organizations.
 According to "Aaron" in a [https://forum.cartridgecollectors.org/t/more-tiny-rimfires-and-sub-caliber-wildcat-rimfires/7602/10 thread at the Cartridge Collectors Forum from 2010]:
-"It is basically a hot-loaded .22 Long Rifle round, with the heavier bullet of the .22 Winchester Magnum Rimfire round and a strengthened .22 Long Rifle case with much more propellant. This was done to increase the power of the American-180, which could not chamber the longer .22 Winchester Magnum Rimfire round, without having to redesign the action and magazines. The power is almost the same as that of the .22 Winchester Magnum Rimfire. The .22 ILARCO round never went into large-scale production, and the sale of the American-180 patent ensured this. The .22 ILARCO is now a collector’s item.
+"It is basically a hot-loaded .22 Long Rifle round, with the heavier bullet of the .22 Winchester Magnum Rimfire round and a strengthened .22 Long Rifle case with much more propellant. This was done to increase the power of the American-180, which could not chamber the longer .22 Winchester Magnum Rimfire round, without having to redesign the action and magazines. The power is almost the same as that of the .22 Winchester Magnum Rimfire. The .22 ILARCO round never went into large-scale production, and the sale of the American-180 patent ensured this. The .22 ILARCO is now a collector’s item."
 == Ballistic Performance ==
@@ Line 20: / Line 28: @@
 |}
 [[Category: Wildcat Cartridges]]