View previous topic :: View next topic |
Author |
Message |
Aloysius Super Member
Joined: Nov 03, 2009 Posts: 2440 Location: B., Belgium
|
Posted: Fri Oct 22, 2010 12:22 pm Post subject: Re: .22LR Velocity vs Barrel Length |
|
Low resolution pictures just travelled to Texas. When you want more details I'll try to make some pictures in daylight, just ask.
|
|
Back to top |
|
|
slimjim Super Member
Joined: May 16, 2009 Posts: 8314 Location: Fort Worth TX
|
Posted: Sat Oct 23, 2010 6:03 am Post subject: Re: .22LR Velocity vs Barrel Length |
|
Aloys, the pictures were great! Thanks!! I finally found some a jackpot of information on the web on the Marlin 39.
www.thehighroad.us/sho...=marlin+39
_________________ "To anger a conservative, lie to him. To anger a liberal, tell him the truth." - Theodore Roosevelt
"The world is a dangerous place to live; not because of the people who are evil, but because of the people who don't do anything about it." - Albert Einstein |
|
Back to top |
|
|
slimjim Super Member
Joined: May 16, 2009 Posts: 8314 Location: Fort Worth TX
|
Posted: Wed Oct 27, 2010 7:21 pm Post subject: Re: .22LR Velocity vs Barrel Length |
|
Ok, here is my plan. I'm going to take my Marlin out to the range and do a 10-shot string for velocity measurement with its stock 24" barrel. I'll then cut about 3" off the barrel with a hacksaw. Repeat the velocity measurement, cut 3 more inches off and repeat again. I think I want to go for 18 inches but may cut finer as I seek a comfortable balance. Post velocity measurements, I'll have the barrel recrowned and a dovetail added for the magazine. This will be a true test of barrel length vs velocity because its all from the same barrel vice barrels from different manufactures with different bores and rifling. The only ammo that showed optimum performance at 16 inches was the CCI Green Tag. I don't have any more and I'm not sure its readily available anymore. I think I'll use the Federal Bulk and Target, Winchester Bulk, RWS Target, and Aguila. That will be 150 rounds. Suggestions?
_________________ "To anger a conservative, lie to him. To anger a liberal, tell him the truth." - Theodore Roosevelt
"The world is a dangerous place to live; not because of the people who are evil, but because of the people who don't do anything about it." - Albert Einstein |
|
Back to top |
|
|
Pumpkinslinger Super Member
Joined: Sep 22, 2007 Posts: 5002 Location: NC foothills
|
Posted: Wed Oct 27, 2010 10:24 pm Post subject: Re: .22LR Velocity vs Barrel Length |
|
Won't you have to at least deburr the muzzle after cutting? Should be an interesting test.
_________________ Mike
"I ain't no better than anybody else, and there ain't nobody better than me!" Ma Kettle |
|
Back to top |
|
|
Aloysius Super Member
Joined: Nov 03, 2009 Posts: 2440 Location: B., Belgium
|
Posted: Thu Oct 28, 2010 1:28 am Post subject: Re: .22LR Velocity vs Barrel Length |
|
SJ, buy a reamer, cut a new .22 chamber in the 3" barrelpieces and fix them inside another cartridge as a cal 12 shell or put it on a lathe to give the outlines that fit in your revolverchamber. A nice thing for traphunting or even giving the last extra headshot.
That's some extra fun and your environmental foothprint will become a little smaller
|
|
Back to top |
|
|
slimjim Super Member
Joined: May 16, 2009 Posts: 8314 Location: Fort Worth TX
|
Posted: Sat Oct 30, 2010 5:20 am Post subject: Re: .22LR Velocity vs Barrel Length |
|
Aloysius wrote: |
cut a new .22 chamber in the 3" barrelpieces and fix them inside another cartridge |
Interesting concept. Guess the bore would have to be offset to make it work.
_________________ "To anger a conservative, lie to him. To anger a liberal, tell him the truth." - Theodore Roosevelt
"The world is a dangerous place to live; not because of the people who are evil, but because of the people who don't do anything about it." - Albert Einstein |
|
Back to top |
|
|
slimjim Super Member
Joined: May 16, 2009 Posts: 8314 Location: Fort Worth TX
|
Posted: Fri Nov 12, 2010 11:59 am Post subject: Re: .22LR Velocity vs Barrel Length |
|
I committed to this project today! I pre-cut the barrel to make it easier to cut-off barrel sections at the range. Hopefully, I'll have some velocity data soon - all from the same barrel. The extra cut in-front of the dove tail will allow me to keep the dovetail on the lower section of the barrel which will make the gunsmith's job easier when he relocates it.
I'm thinking 18.5" to 19" looks about right with the front stock. Any shorter and it will start to look stubby.
Description: |
|
Filesize: |
96.36 KB |
Viewed: |
5010 Time(s) |
|
_________________ "To anger a conservative, lie to him. To anger a liberal, tell him the truth." - Theodore Roosevelt
"The world is a dangerous place to live; not because of the people who are evil, but because of the people who don't do anything about it." - Albert Einstein |
|
Back to top |
|
|
44marty Super Member
Joined: Mar 20, 2009 Posts: 775 Location: Cheshire, MA; USA
|
Posted: Fri Nov 12, 2010 7:39 pm Post subject: Re: .22LR Velocity vs Barrel Length |
|
Very nice experiment, Slim. It will be interesting to see your results. Will you be trying both standard and hyper-velocity ammo?
_________________ _____________________________________
The strength of the wolf is in the pack; the strength of the pack is in the wolf. ~ R. Kipling
I LOVE YOU, LADY LUCK !!! |
|
Back to top |
|
|
slimjim Super Member
Joined: May 16, 2009 Posts: 8314 Location: Fort Worth TX
|
Posted: Fri Nov 12, 2010 11:04 pm Post subject: Re: .22LR Velocity vs Barrel Length |
|
44marty wrote: |
Will you be trying both standard and hyper-velocity ammo? |
I've decided not to buy any more ammo. I must have X000+ rounds already. I plan to use Federal Bulk and Target, Winchester Bulk, CCI Mini-Mag, RWS Target, and Aguila. That covers the range from highest to lowest velocity from my last test. This time, all the data will be from the same barrel.
Maybe I can get out tomorrow morning.
_________________ "To anger a conservative, lie to him. To anger a liberal, tell him the truth." - Theodore Roosevelt
"The world is a dangerous place to live; not because of the people who are evil, but because of the people who don't do anything about it." - Albert Einstein |
|
Back to top |
|
|
slimjim Super Member
Joined: May 16, 2009 Posts: 8314 Location: Fort Worth TX
|
Posted: Sat Nov 13, 2010 9:39 pm Post subject: Re: .22LR Velocity vs Barrel Length |
|
I decided to start a second post with the results of today's assessment.
.22LR Velocity vs Barrel Length - Take 2
_________________ "To anger a conservative, lie to him. To anger a liberal, tell him the truth." - Theodore Roosevelt
"The world is a dangerous place to live; not because of the people who are evil, but because of the people who don't do anything about it." - Albert Einstein |
|
Back to top |
|
|
|