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A couple of questions
-- Russell E 01:00, 14 April 2006 (UTC)
I've see two types of conversions; the type covered in the article is cartridge shaped, and uses the firearm barrel to alter the cartridge used, but not the caliber. The other is longer, with a sub-caliber barrel that sits inside the firearm's barrel, and allows a change in caliber as well. This latter type is most common with shotguns, which use inserts to convert, say, a 12 ga. double to a 28 or .410, but I've also seen them available for other firearms--they work best with break opens. One I've personally used was a .22 Mag/.38 Special adapter for use in a T/C Contender, which was nice in that it didn't need the offset firing pin adapter needed in single firing pin guns, you just switch the hammer switch and use the T/C's rimfire pin. Truly odd are the rimfire inserts for shotguns, which may be designed with the insert barrel offset so the centerfire firing pin falls on the rim of the rimfire cartridge. Here's a source of just about any conversion you can imagine: http://www.mcace.com/Insertsindex.htm Here's a maker of short subgauge shotgun inserts: http://www.chambermates.com/ and here's Briley's full length tube sets: http://www.briley.com/index.asp?PageAction=VIEWCATS&Category=16 scot 19:31, 11 May 2007 (UTC)
As per my discussion with Yaf (see here) I'm backing up the current article contents so I can restructure the article to cover the whole range of cartridge conversions. After the structure is done, this content can be merged back into the appropriate section(s).
is a device commonly sold for several 0.30-caliber-chambered rifles. [2] These devices enable the bolt-action rifles for which they are made to use 32 ACP cartridges in addition to the cartridges in the caliber for which the rifles are chambered. The caliber conversion sleeves resemble fired cartridge cases in the rifle calibers for which they are made, but are made of steel instead of brass, and have an opening where the primer would normally sit into which the 32 ACP cartridge is inserted, prior to chambering the combined 32 ACP round and caliber conversion sleeve in the rifle. No modifications to the rifle are required.
Three such 0.30-caliber rifles commonly have such caliber conversion sleeves available, for rifles chambered in the following cartridges:
Caliber conversion sleeves work because the common 32 ACP bullet is 0.3125 inches in diameter, and will fire in practice in rifles with only slightly smaller bores than the 32 ACP bullet diameter, provided the difference in the rifle chamber size is properly compensated for with a caliber conversion sleeve.
There are limitations on the use of such caliber conversion sleeves. For example, the .303 British 174gr round normally exits the rifle muzzle at a velocity of approximately 2440 ft/s. When firing the 71 gr 32 ACP in the caliber conversion sleeve in such a rifle, the 32 ACP round will exit the muzzle at a velocity of only around 1100 ft/s. This reduces the effective range considerably, often to only 50 yards or so, and provides much less foot-lbs on target. The sights are additionally only approximately accurate, as the bullet mass (in grains) and the nominal rifle cartridge velocity have all been assumed in the calibration of the sights on the rifle. The caliber conversion sleeve is also typically capable of being loaded only one round at a time, effectively converting a repeater rifle into a single shot rifle.
Users also need to be aware that a squib may often result, as cheap 32 ACP FMJ cartridges may not have enough energy for the 32 ACP bullet to clear the barrel. This is especially dangerous if a high-powered rifle round is then loaded and fired after a 32 ACP bullet has lodged in the barrel.
However, the benefits when proper 32 ACP ammunition is used are that the recoil and noise of the rifle is greatly reduced, the price per round fired is much cheaper ($0.20/rd, or less, vs. $0.50-$1.00/rd), and, in a survival situation in which only a limited number of rifle rounds are available for hunting, the 32 ACP is certainly adequate for small-game hunting out to 50 yards. Hence, the caliber conversion sleeve can provide additional survival hunting rounds if one additionally carries a box or two of lighter 32 ACP cartridges in addition to carrying the usual rifle cartridges. In addition, it often becomes possible to use an indoor pistol range when firing 32 ACP cartridges in a hunting rifle chambered for a much more powerful 0.30-caliber rifle, opening up more firing range opportunities for practicing with powerful rifles in dense urban areas.
Caliber conversion sleeves for firing 32 ACP cartridges in 30-caliber rifles sell for approximately $16-$20 (2006) from major US gun parts distributors.
Occasionally, chromed or blued supplemental chambers for firing .32 S&W (0.315-inch diameter bullets) in 30-caliber rifles are also seen; these devices often date to the late 19th Century, and were made by Winchester, among others. [3] Similarly, there were also comparable devices sold for the 6.5 x 54 Mannlicher-Schönauer Model 1903 to reduce the round down to .25 auto that were widely available until roughly WW II. [4] The comparable devices for these older cartridge conversions are no longer commonly sold by major US gun parts distributors.
scot 14:16, 14 May 2007 (UTC)
One question: What about insert information about inventing of caliber conversion sleve by Percy Scott? He invented this instrument during his Mediterranean service. He use this for better training of his man and lesser consumption of expensive ammo. (during this time there are not big investment into training of sailors.) (Sory for my english. Better if any other - native speaker - give this information into regular page) 37.188.188.40 ( talk) 15:24, 28 December 2017 (UTC)
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The result of the move request was: Moved to Caliber conversion device. ( closed by non-admin page mover) Bensci54 ( talk) 16:48, 30 May 2024 (UTC)
Caliber conversion sleeve → Caliber conversion – Since there are several different methods of caliber conversion covered in this article, and it doesn't actually get to the caliber conversion sleeve until the third section, I am proposing a move and rescope to the general concept of converting calibers. This will also mean a merge of anything suitable from the newly created caliber change (which I feel is a useful redirect, but conversion seems significantly more common). Alpha3031 ( t • c) 12:36, 15 May 2024 (UTC) — Relisting. ASUKITE 15:43, 23 May 2024 (UTC)
As per the above move proposal, I am also proposing a merge as the two articles cover a substantially similar topic, and the newly created article seems to have some useful information not present in this one. Alpha3031 ( t • c) 12:40, 15 May 2024 (UTC)
This article is rated Start-class on Wikipedia's
content assessment scale. It is of interest to the following WikiProjects: | |||||||||||
|
A couple of questions
-- Russell E 01:00, 14 April 2006 (UTC)
I've see two types of conversions; the type covered in the article is cartridge shaped, and uses the firearm barrel to alter the cartridge used, but not the caliber. The other is longer, with a sub-caliber barrel that sits inside the firearm's barrel, and allows a change in caliber as well. This latter type is most common with shotguns, which use inserts to convert, say, a 12 ga. double to a 28 or .410, but I've also seen them available for other firearms--they work best with break opens. One I've personally used was a .22 Mag/.38 Special adapter for use in a T/C Contender, which was nice in that it didn't need the offset firing pin adapter needed in single firing pin guns, you just switch the hammer switch and use the T/C's rimfire pin. Truly odd are the rimfire inserts for shotguns, which may be designed with the insert barrel offset so the centerfire firing pin falls on the rim of the rimfire cartridge. Here's a source of just about any conversion you can imagine: http://www.mcace.com/Insertsindex.htm Here's a maker of short subgauge shotgun inserts: http://www.chambermates.com/ and here's Briley's full length tube sets: http://www.briley.com/index.asp?PageAction=VIEWCATS&Category=16 scot 19:31, 11 May 2007 (UTC)
As per my discussion with Yaf (see here) I'm backing up the current article contents so I can restructure the article to cover the whole range of cartridge conversions. After the structure is done, this content can be merged back into the appropriate section(s).
is a device commonly sold for several 0.30-caliber-chambered rifles. [2] These devices enable the bolt-action rifles for which they are made to use 32 ACP cartridges in addition to the cartridges in the caliber for which the rifles are chambered. The caliber conversion sleeves resemble fired cartridge cases in the rifle calibers for which they are made, but are made of steel instead of brass, and have an opening where the primer would normally sit into which the 32 ACP cartridge is inserted, prior to chambering the combined 32 ACP round and caliber conversion sleeve in the rifle. No modifications to the rifle are required.
Three such 0.30-caliber rifles commonly have such caliber conversion sleeves available, for rifles chambered in the following cartridges:
Caliber conversion sleeves work because the common 32 ACP bullet is 0.3125 inches in diameter, and will fire in practice in rifles with only slightly smaller bores than the 32 ACP bullet diameter, provided the difference in the rifle chamber size is properly compensated for with a caliber conversion sleeve.
There are limitations on the use of such caliber conversion sleeves. For example, the .303 British 174gr round normally exits the rifle muzzle at a velocity of approximately 2440 ft/s. When firing the 71 gr 32 ACP in the caliber conversion sleeve in such a rifle, the 32 ACP round will exit the muzzle at a velocity of only around 1100 ft/s. This reduces the effective range considerably, often to only 50 yards or so, and provides much less foot-lbs on target. The sights are additionally only approximately accurate, as the bullet mass (in grains) and the nominal rifle cartridge velocity have all been assumed in the calibration of the sights on the rifle. The caliber conversion sleeve is also typically capable of being loaded only one round at a time, effectively converting a repeater rifle into a single shot rifle.
Users also need to be aware that a squib may often result, as cheap 32 ACP FMJ cartridges may not have enough energy for the 32 ACP bullet to clear the barrel. This is especially dangerous if a high-powered rifle round is then loaded and fired after a 32 ACP bullet has lodged in the barrel.
However, the benefits when proper 32 ACP ammunition is used are that the recoil and noise of the rifle is greatly reduced, the price per round fired is much cheaper ($0.20/rd, or less, vs. $0.50-$1.00/rd), and, in a survival situation in which only a limited number of rifle rounds are available for hunting, the 32 ACP is certainly adequate for small-game hunting out to 50 yards. Hence, the caliber conversion sleeve can provide additional survival hunting rounds if one additionally carries a box or two of lighter 32 ACP cartridges in addition to carrying the usual rifle cartridges. In addition, it often becomes possible to use an indoor pistol range when firing 32 ACP cartridges in a hunting rifle chambered for a much more powerful 0.30-caliber rifle, opening up more firing range opportunities for practicing with powerful rifles in dense urban areas.
Caliber conversion sleeves for firing 32 ACP cartridges in 30-caliber rifles sell for approximately $16-$20 (2006) from major US gun parts distributors.
Occasionally, chromed or blued supplemental chambers for firing .32 S&W (0.315-inch diameter bullets) in 30-caliber rifles are also seen; these devices often date to the late 19th Century, and were made by Winchester, among others. [3] Similarly, there were also comparable devices sold for the 6.5 x 54 Mannlicher-Schönauer Model 1903 to reduce the round down to .25 auto that were widely available until roughly WW II. [4] The comparable devices for these older cartridge conversions are no longer commonly sold by major US gun parts distributors.
scot 14:16, 14 May 2007 (UTC)
One question: What about insert information about inventing of caliber conversion sleve by Percy Scott? He invented this instrument during his Mediterranean service. He use this for better training of his man and lesser consumption of expensive ammo. (during this time there are not big investment into training of sailors.) (Sory for my english. Better if any other - native speaker - give this information into regular page) 37.188.188.40 ( talk) 15:24, 28 December 2017 (UTC)
Hello fellow Wikipedians,
I have just modified 4 external links on Caliber conversion sleeve. Please take a moment to review my edit. If you have any questions, or need the bot to ignore the links, or the page altogether, please visit this simple FaQ for additional information. I made the following changes:
When you have finished reviewing my changes, you may follow the instructions on the template below to fix any issues with the URLs.
This message was posted before February 2018.
After February 2018, "External links modified" talk page sections are no longer generated or monitored by InternetArchiveBot. No special action is required regarding these talk page notices, other than
regular verification using the archive tool instructions below. Editors
have permission to delete these "External links modified" talk page sections if they want to de-clutter talk pages, but see the
RfC before doing mass systematic removals. This message is updated dynamically through the template {{
source check}}
(last update: 5 June 2024).
Cheers.— InternetArchiveBot ( Report bug) 18:22, 11 January 2018 (UTC)
The result of the move request was: Moved to Caliber conversion device. ( closed by non-admin page mover) Bensci54 ( talk) 16:48, 30 May 2024 (UTC)
Caliber conversion sleeve → Caliber conversion – Since there are several different methods of caliber conversion covered in this article, and it doesn't actually get to the caliber conversion sleeve until the third section, I am proposing a move and rescope to the general concept of converting calibers. This will also mean a merge of anything suitable from the newly created caliber change (which I feel is a useful redirect, but conversion seems significantly more common). Alpha3031 ( t • c) 12:36, 15 May 2024 (UTC) — Relisting. ASUKITE 15:43, 23 May 2024 (UTC)
As per the above move proposal, I am also proposing a merge as the two articles cover a substantially similar topic, and the newly created article seems to have some useful information not present in this one. Alpha3031 ( t • c) 12:40, 15 May 2024 (UTC)