GTA
General Discussion To Gateway To Airguns => Airgun Gate => : chortdraw March 19, 2010, 02:12:20 PM
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Is there a rule of thumb or some magic length to bob a barrel?? I am getting ready to work on my Rem 1200 and I want to cut the barrel and add a nice light weight break on it. So first I have to cut and crown the barrel. I have all ready done a real make over on the stock. I need some answers from the experienced choppers!!........thanks ...Chortdraw
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personaly I would push a pellet down the barrel and feel for tight spots and try to find one around the length I was wanting to chop the barrel off at... then carefully mark the beginning and end of the tight spot and cutjust a touch pastthe end of the tight mark.... that way after trueing it up and recrowning I know I have a "choke" at the muzzle which according to the guru's will help give you the best accuracy...
they say modern springers get to full speed in the first 7-10 inches of barrel so I would prolly hope for a tight spot between that and 14 inches somewhere LOL
YMMV and its just what I am thinking lol... I have not chopped an AG barrel yet but have been doing alot of asking questions and research for my upcoming build and adding that to my gunsmithing backgroud thats what I plan to do when I cut and recrown my project.....
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Thats what I did to 3 of my rifles. My 440 and 89 I cut at 12.5 inches, the Mendosa barrel's bore opened up at 10.25 inches and I cut a quarter inch past that. Recrowned all 3 with electric drill using dremel type stone dipped in valve grinding compound and then brass round head screw with same compound. Very happy with results. 89's a bear to cock now. Got most of my info here reading Tim and Howie's posts. Mark
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Thank for the information guys. I was hoping to cut it around 13 inches..( my lucky #) so if the pellet is good there I guess thats where I will give it a try. Want to see how good I can get this to shoot so when I get ready to do a .22 cal for my hunting I will have a good idea of what is going on. Having fun so far and have been learning a lot. Easy to keep an old man amused...grin!!
Chortdraw
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Ok, chopped the barrel to 13 inches and crowned it and temporally reinstalled the front sight and also the rear sight. At 10 yds it holds a good group and the pellets are cutting a nice round hole so I guess it is not getting any interference at the Muzzle. Now to decide what brake to mount on it? I like the balance so I am thinking a alum. brake?