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Air Gun Home Forum Index » Rifles » Bent Barrel on RWS Model 36    View previous topic :: View next topic  Bent Barrel on RWS Model 36   Posted: Wed Nov 05, 2008 7:52 am Keith99RS New Member Joined: 03 Nov 2008 Posts: 8 Location: Suffield, CT I noticed the barrel on my RWS Model 36 is bent down. Not angled down but bent/bowed down. Like an arch. If held to a flat surface plate it is about 1/8" hump backed in the center. It did slide and fall not too long ago when I was mounting my new scope and knocked off the front sight. However I don't think it was with enough force or the right direction to cause the bend. Previously I had only used the open sights. The scope was a new thing for me. I first mounted the scope, a GAMO, using the supplied mounts. When I did I had the scope maxed out on elevatin and it shot 6" low at 20ft. It did shoot on perfect as far as windage. Doing some research I discobered "barrel droop" and the RWS C Mount scope mount. I bought it and mounted and set it up it per the instructions and it shot 6" high with the scope zeroed approximately to center. I am thinking the bent barrel is not that bad or may have always been there as it was a tack driver with open sights. It also more than elevated with the new mount. Basically what I am asking is, does this issue with the barrel sound like a problem? I don't truly know if it has always been this way. Is there anywhere I can get a replacement barrel for the rifle? I cannot find any barrel info with any places that sell RWS parts. Thanks for any help!!   Posted: Wed Nov 05, 2008 8:35 am broommaster2000 Moderator Joined: 10 Mar 2007 Posts: 5714 Location: City of Groningen, Groningen, The Netherlands A bend barrel. You could try to bend it back, allthough a new barrel would probably easyer. Have you tried contacting RWS? _________________ BIG GAP   Posted: Thu Nov 06, 2008 1:12 am kanyon Silver Status Member Joined: 09 Aug 2008 Posts: 1582 Location: New Zealand Hi...U will be very surprised just how soft air gun barrels are. I strightened one only a few weeks ago. I clamped the pivit block in a vice with soft jaws then slid a length of plastic hose over the barrel to protect it then put a bit of pipe over it and slowly pulled it till it was stright. Do it bit by bit checking regualy. _________________ Career Infinity PCP .22 Webley Patriot .25 Hatsan mod 75 .22 Hatsan mod 99 .177 (Quattro & SAS) Kral underlever .177 ............................................. .   Posted: Thu Nov 06, 2008 11:26 am Keith99RS New Member Joined: 03 Nov 2008 Posts: 8 Location: Suffield, CT Thanks guys! I ordered a new barrel from Umarexusa this morning. I opted for a .22 cal. this time around as they said the barrels are interchangeable. I figure I can work on straightening the .177 model at my lesuire and it it works I will have a choice of barrels to use in the future.   Posted: Thu Nov 06, 2008 11:54 am AirGunEric Site Admin Joined: 20 Jan 2007 Posts: 6929 Location: "Out There" Many people have straightened barrels using a press and some cushioning. Because most "bent" barrels are only warped, it's usually not an epic job, as Kanyon pointed out. Mind-you, if you don't plan to use a scope on the rifle, the bent barrel shouldn't matter for open sights where both the front and rear sight can be adjusted enough to compensate: http://www.airgunhome.com/agforum/viewtopic.php?t=301 _________________ ` I'd say "I care." But I'd be lying. Canadian Airgun Supplier: http://www.scopesandammo.com/storefront   Posted: Thu Nov 06, 2008 8:42 pm vAgRaNt Member Joined: 24 Oct 2008 Posts: 35 Quote: Many people have straightened barrels using a press and some cushioning. Because most "bent" barrels are only warped, it's usually not an epic job, as Kanyon pointed out. I bought a 24" .177 from the old Crosman Canada, and in thier wisdom, they shipped it in a bubble wrap envelope, with no other internal structure than the barrel and the bubblewrap. Aside from the fact that this barrel arrived looking like it was lying on the floor of the warehouse for the past half dozen years (scratched blueing, light browning, and filthy dirty (muddy)) it also benefitted from it's postal system adventure, by having not one, but two distinct opposing bends, such that it looked like a scratched, rusty, dirty, 24" long lightning bolt. End Sad Story - Begin Happy: it took me the better part of a couple hours, but I did manage to get the thing straight enough to roll on a sheet of glass. Careful massaging resulted in a nearly perfectly straight tube. It wasn't necessicarily the end of the issues with this pipe, but after instilling .002" of choke into the last 1/4 inch of the muzzle, it's even reasonably accurate. Moral of the story is; If I can do it, anyone can. A bent barrel isn't the end of the world; they can be brought back to ~true~ with a little careful "love and attention", and they can be made to shoot ~accurately~ too. HTH's, Good Luck!   Posted: Sat Nov 08, 2008 10:12 am Slavia Moderator Joined: 31 Mar 2008 Posts: 4382 Location: Waseca, Minnesota, USA Quote: after instilling .002" of choke into the last 1/4 inch of the muzzle How did you accomplish that? _________________ ¡Listo! ¡Apunte! ¡Fuego!   Posted: Sat Nov 08, 2008 10:56 am cw Banned Joined: 10 Feb 2008 Posts: 1771 Choking a barrel is actually pretty easy.Take a large nut and drill the treads out so that it's ID is the same size as the OD of the barrel. Then, saw the nut in half so that you have two C-shaped pieces. Tape the two pieces around the end of the barrel where you wish the choke to start, so that there is equal space between each slit on each side of the barrel and squeeze. You can put the assmbly on an anvil and hit it with a hand maul once, turn it, hit it again, etc... until you produce the desired amout of choke. I used to use a shop press until it blew a seal. I usually recrown when finished. This works very well if you want to cut a barrel shorter and have accuracy afterwards.   Posted: Sun Nov 09, 2008 2:55 am Slavia Moderator Joined: 31 Mar 2008 Posts: 4382 Location: Waseca, Minnesota, USA Just when I thought I was done with the mechanicals of my G1...... _________________ ¡Listo! ¡Apunte! ¡Fuego!   Posted: Sun Nov 09, 2008 5:34 pm vAgRaNt Member Joined: 24 Oct 2008 Posts: 35 Slavia wrote: vAgRaNt wrote: after instilling .002" of choke into the last 1/4 inch of the muzzle How did you accomplish that? Not completely dis-similar to "cw's" outline, other than I used a "jig" that was only cut on one side, vs. being "cut in half", and utilized a mighty vice, instead of hitting it with a hammer. It was my intention to be able to control the amount of choke induced, and the thoughts of hitting it with hammer (I had considered it. . . .) sorta intimidated me, after having invested so much time getting the barrel reasonably straight. I was able to measure pellets pushed through the bore during the process, to be able to "feel' the choke, as well as measure the pellets with calipers. Results: Before After Top line of targets is at 10 pumps, bottom at 5 pumps; Crosman 13XX with the 24" "Lightning Bolt" barrel. Pretty substancial improvement IMHO, to this barrel at least - YMMV. I have a .22 QB barrel I need to complete the same operation on; maybe I should document my progress here for any that might be interested. . . .   Posted: Sat Nov 22, 2008 10:49 pm Keith99RS New Member Joined: 03 Nov 2008 Posts: 8 Location: Suffield, CT Got the new .22 cal. barrel and installed it today. Hats off to Umarex as they were awesome as a sounding board and also got me the new barrel far faster than I ever expected. Now if the temperatures around here would get above 30 degrees (stupidly unseasonably cold for November) I will get out and get it sighted in. _________________ RWS Model 36 .177 cal. soon to be .22 cal.!! RWS C mount Gamo 4X32 scope   Posted: Sun Nov 23, 2008 1:38 am kanyon Silver Status Member Joined: 09 Aug 2008 Posts: 1582 Location: New Zealand I have wondered if cocking can bend the barrels over time as they are very soft and if you are a bit vilolant in your cocking action. As I have had bent barrels that I know wern't bent when I got the gun. I can't remember having a bent 1.77 barrel, all seem to be .22 Barrel choking.. You can use a lathe turn the barrel with the end in a roller steady and slowly increase the pressure on the steady rollers it will compress the barrel end slowly and evenly. _________________ Career Infinity PCP .22 Webley Patriot .25 Hatsan mod 75 .22 Hatsan mod 99 .177 (Quattro & SAS) Kral underlever .177 ............................................. . 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