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Rifles, Reloading, Optics, Equipment
Gunsmithing
Chambering both ends of a barrel - Project "Carnival Hotdog Barrel"
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<blockquote data-quote="LRSickle" data-source="post: 1327536" data-attributes="member: 18167"><p>I'll explain the name in a bit. This might be a long post.</p><p></p><p>I was sitting at my desk, watching a bear poop outside my office window (Really! I work at a salmon hatchery) while wondering what my next gun project will be. I've had this bull barrel sitting on my desk for over a year now. It's been a great barrel. It was originally a 22-250 and shot really well. It's had the shoulder/tenon set back .004 and chambered it to 22-250 AI. [the neck/shoulder junction on Ackleys are generally .004 shorter than their parent case]. It also shot really well. But that wasn't enough so it was punched it out to a 22 CHeetah. Now that a fun caliber!! After the throat was roasted in that, I lopped off about 2" and rechambered it to 220 Swift. I thought, "I wonder how many times I can rechamber this before I run out of the minimum 1.055" diameter I need for a tenon?" Hmmmm...</p><p>I also wondered if I could chamber the muzzle end and shoot back through the barrel. Hmmmm... If I did chamber the muzzle end I wouldn't have enough shoulder for my recoil lug. Hey, I know! I'll do it Savage style with a barrel nut. I have several Savage barrel nuts laying around but they're 20 pitch and my Rem700 is 18 pitch. Hell, I'll just make my own barrel nut!</p><p>Before I knew it I was started on my new project. <u>I was going to chamber both ends!</u> I'd imagine somebody, somewhere has done it before but I'd never heard of it. I did a brief internet search and turned up one result that didn't have much info about it.</p><p>I thought long and hard about two things, safety and accuracy. I approached a coworker who is a very accomplished gun-plumber as well as a fine machinist. We mulled over the possibility for several days. How is the leade in the other chamber going to affect bullet flight? Muzzles are pretty precise. The bullet needs to clear all the lands and grooves at the same time or it's blown(?) off course. Accuracy I didn't care too much about but it had to be safe. I couldn't foresee any problems with safety. It turned out I was wrong, kinda, I'll get to that as I go along.</p><p>It's all done. I've shot through both chambers and lived to tell it. I learned a lot and found some pretty surprising things.</p><p></p><p>When a co-worker came in the shop and ask what I was doing, I told him I'm making a "Carnival Hotdog" barrel. This barrel is just like finishing a hotdog at the carnival, when I'm done with it I'll be shooting out of both ends. <img src="http://utahwildlife.net/forum/images/smilies/icon_smile.gif" alt="" class="fr-fic fr-dii fr-draggable " style="" /></p></blockquote><p></p>
[QUOTE="LRSickle, post: 1327536, member: 18167"] I'll explain the name in a bit. This might be a long post. I was sitting at my desk, watching a bear poop outside my office window (Really! I work at a salmon hatchery) while wondering what my next gun project will be. I've had this bull barrel sitting on my desk for over a year now. It's been a great barrel. It was originally a 22-250 and shot really well. It's had the shoulder/tenon set back .004 and chambered it to 22-250 AI. [the neck/shoulder junction on Ackleys are generally .004 shorter than their parent case]. It also shot really well. But that wasn't enough so it was punched it out to a 22 CHeetah. Now that a fun caliber!! After the throat was roasted in that, I lopped off about 2" and rechambered it to 220 Swift. I thought, "I wonder how many times I can rechamber this before I run out of the minimum 1.055" diameter I need for a tenon?" Hmmmm... I also wondered if I could chamber the muzzle end and shoot back through the barrel. Hmmmm... If I did chamber the muzzle end I wouldn't have enough shoulder for my recoil lug. Hey, I know! I'll do it Savage style with a barrel nut. I have several Savage barrel nuts laying around but they're 20 pitch and my Rem700 is 18 pitch. Hell, I'll just make my own barrel nut! Before I knew it I was started on my new project. [U]I was going to chamber both ends![/U] I'd imagine somebody, somewhere has done it before but I'd never heard of it. I did a brief internet search and turned up one result that didn't have much info about it. I thought long and hard about two things, safety and accuracy. I approached a coworker who is a very accomplished gun-plumber as well as a fine machinist. We mulled over the possibility for several days. How is the leade in the other chamber going to affect bullet flight? Muzzles are pretty precise. The bullet needs to clear all the lands and grooves at the same time or it's blown(?) off course. Accuracy I didn't care too much about but it had to be safe. I couldn't foresee any problems with safety. It turned out I was wrong, kinda, I'll get to that as I go along. It's all done. I've shot through both chambers and lived to tell it. I learned a lot and found some pretty surprising things. When a co-worker came in the shop and ask what I was doing, I told him I'm making a "Carnival Hotdog" barrel. This barrel is just like finishing a hotdog at the carnival, when I'm done with it I'll be shooting out of both ends. [IMG]http://utahwildlife.net/forum/images/smilies/icon_smile.gif[/IMG] [/QUOTE]
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Chambering both ends of a barrel - Project "Carnival Hotdog Barrel"
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