What all is involved in turning a 22xx gun into a .20 caliber...

What all is involved in turning a 22xx gun into a .20 caliber...

Joined: February 15th, 2006, 10:18 pm

August 17th, 2012, 2:25 am #1

Hey guys I've been on a .20 caliber kick lately and I'd like to do my first 2240 custom on a .20 caliber barrel.

From what I understand I'll need a LW barrel and turn it down to fit in the breech of gun, as well as drill and drill and counter bore a hole for the transfer port.

Does the bolt need to be modified at all?

I did a search but I guess I'm not phrasing it right or something. I'd like to see if there is a nice write up with pics...I know that's asking alot though.

I can machine everything myself with the exception of things that need to be milled, Just a drill press and a strong South Bend 12 3/4"x48" for the time being. Really appreciate any input on this... The .20 caliber is quickly becoming my favorite caliber.

Semper Fi,
Derek
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Joined: April 28th, 2010, 12:23 am

August 17th, 2012, 3:02 am #2

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Joined: April 28th, 2010, 12:23 am

August 17th, 2012, 3:48 am #3

Last edited by robnewyork on August 17th, 2012, 3:50 am, edited 1 time in total.
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Joined: February 15th, 2006, 10:18 pm

August 17th, 2012, 5:42 am #4

I might order up a few an make some pistols from them though...Thanks Rob
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Joined: September 21st, 2007, 12:13 pm

August 17th, 2012, 2:40 pm #5

Hey guys I've been on a .20 caliber kick lately and I'd like to do my first 2240 custom on a .20 caliber barrel.

From what I understand I'll need a LW barrel and turn it down to fit in the breech of gun, as well as drill and drill and counter bore a hole for the transfer port.

Does the bolt need to be modified at all?

I did a search but I guess I'm not phrasing it right or something. I'd like to see if there is a nice write up with pics...I know that's asking alot though.

I can machine everything myself with the exception of things that need to be milled, Just a drill press and a strong South Bend 12 3/4"x48" for the time being. Really appreciate any input on this... The .20 caliber is quickly becoming my favorite caliber.

Semper Fi,
Derek
a few years back. I started with a .470"OD L/W barrel and went from there. At the time I made a scratch built bolt, but you could probably use a .177 bolt with a one up o ring or turn an ID taper in the barrel to fit a .22 bolt. The lathe part of the project is a piece of cake, however doing a good job of drilling and facing the TP hole using a drill press is going to be challenging for sure.
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Joined: February 15th, 2006, 10:18 pm

August 17th, 2012, 3:24 pm #6

Does the OD of the barrel need to close to the ID of the barrel or is that what the O-ring is for? As far as picking a O-ring size what's the general guide lines on fit and tolerances? Really appreciate the help guys...I can tell this is going to be a fun project. Always have a blast makin chips.
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Joined: August 3rd, 2008, 2:29 pm

August 17th, 2012, 4:23 pm #7

size .22 probe without any issues ,i would suggest making one or buying an aftermarket one though

TOO many freaks and NOT enough circuses
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Joined: February 15th, 2006, 10:18 pm

August 17th, 2012, 6:42 pm #8

over the standard .22 size probe if it works ok? Obviously extending the probe is the only advantage I'm seeing. Would appreciate any explanation. Thanks!

Semper Fi,
Derek
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Joined: August 3rd, 2008, 2:29 pm

August 17th, 2012, 8:14 pm #9

should give a more fps

TOO many freaks and NOT enough circuses
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Joined: September 21st, 2007, 12:13 pm

August 17th, 2012, 10:22 pm #10

Does the OD of the barrel need to close to the ID of the barrel or is that what the O-ring is for? As far as picking a O-ring size what's the general guide lines on fit and tolerances? Really appreciate the help guys...I can tell this is going to be a fun project. Always have a blast makin chips.
the .470" OD L/W barrel you will have to turn down a stub to fit the 7/16" ID of the breech. If you use any of the other larger OD L/W barrels you will have to either raise the breech, or buy a riser breech.
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