A more modest velocity is smoother and easier to shoot well. For fine-tuning the gas-ram, there is a Schrader valve that can be pumped just like a tyre, using the proprietary Theoben pump or a mountain bike pump. 177 by the way. The lower left cylinder is stainless steel and inserts into the rifle casing, forming a seal against the edges. 22" barrel (including moderator), figured walnut stock with rubber recoil pad. Also good for HW90. The air rifle with the unique Theoben gas ram system. My first Eliminator arrived from Litt’s DOA and I received instructions from the factory regarding the charging process. Thank you. H.E. Please note this is for the Weihrauch HW90 later models, with Theoben gas ram fitted. There is another adapter that is smaller (yellow) that fits the port. (High Efficiency) gas ram system, seven-shot for sale by Craig Joseph on GunsAmerica - 991534679 The newer HE system has a skinny stem at higher pressure. Comes with a single block mount and a Weaver… £399 US$541/€443 Theoben.22 Eliminator-Outfit Your email address will not be published. The power has been achieved by the combination of producing the rifle with a long stroke piston and specially developed piston recoil damper valve and the well tried Theoben H.E. Page 1 of 2 1 2 Next > Start off at 600 psi and take it from there. I read about the gummy like seal. The Schrader valve is accessed through the hole, but I don't recall being able to see threads. Do not use the gauge! gas-ram system. An inertia weight follows the piston forward and virtually eliminates piston bounce, improving the shot cycle and producing a shot-to-shot consistency in the order of five or six feet per second. Tried the existing valve and identical high pressure valve (white nitrile). I know RX rifles are between 23-24 BAR from talking to Beeman 20 years ago. I believe that both of my rifles have the HE rams. Andy McLachlan’s memorable multi-shot magazine moment. IMHO, the opposite is true. The barrel on mine seems to “sag” at discharge ever so slightly. The adapter is to use the “Slim Jim” pump on both systems. Something like the Hill pumps. NOTE: Do not exceed the Rifle Manufacturers recommended pressure. The gas-ram had a short lock time, but gained a reputation for harsh recoil. Theoben and Weihrauch Gas Ram rifles. The problem lies in the trigger. The very fast locking time and the recoil reducing system as well as its stable and solid conception are the outstanding features. But it is harsh and hold sensitive. The brand new FX Crown MkII IN STOCK NOW at Baker Airguns... Pyramyd Air launches Build Your Own Airgun! My Crosman .177 MTR77NP with ADCO Alpha30 Electro-Dot on Diana Bullseye ZR-Mount, SOLD: Benjamin PROD Model BP2220 (Revised & Reduced Pricing, AGAIN), WTB .380 Shells for Crosman Trapmaster 1100. I use trial and error to get the velocity and smoothness desired. VPilot. The chamber before the valve is smooth. VPilot. Theoben created the HE system to get a new patent and touted the new ram as an improvement. I bought the gun used, my 2nd attempt at mastering the magnum .177. Theoben had officially been making gas-ram-powered air rifles since 1980 when they were granted the patent for the system, but Ben Taylor had the idea back in 1978 when he was working on a Suzuki GS1000 motorbike which had air-assisted forks. For the uninitiated, this means that when the rifle is cocked, the piston compresses a sealed chamber of air (Theoben previously used Nitrogen), effectively replacing a normal mainspring. The only reason for the change was the expiration of the original patent. The very fast locking time and the recoil reducing system as well as its stable and solid conception are the out-standing features. The only reason for the change was the expiration of the original patent. The pre-HE system can use the original bicycle style pump. ... system overloaded. No maintenance required and totally reliable. Theoben created the HE system to get a new patent and touted the new ram as an improvement. That is why the HW-90 has proven to be so durable. NOT for Theoben models - see my other listings for Theoben rifles. 1/8 BSP Male thread to fit most hoses. Excellent AS N... for sale This is a pristine condition BEEMAN.22 Cal. Just proceed as if it is a low pressure system (slowly) until the desired velocity is obtained I using the slim jim. A good number of airgunners are familiar with the fine airgun line produced by Theoben. Theoben .22 Eliminator-Outfit Break Barrel - Gas Ram Air Rifle (R/H) - S/H The Theoben gas-ram took the world by storm and they wisely patented the idea quickly, giving them exclusive use for many years. Any recommended pumps other than the current PCP hand pumps would be appreciated. Welcome to our Group Devoted to the Greatest most original Designed Air rifle ever made the Theoben Gas Ram No sales please. pellet at 895 fps. The Weihrauch HW90 incorporates the Theoben gas ram system. I’ve dropped the pressure to about 20-22 bar. Parker Hale Phoenix An excellent condition Theoben Eliminator HE gas ram break barrel FAC rated (20.8 ft lbs) air rifle in rare .20 calibre. Apparently there is a technique to this that I have to figure out. So I bought a gas ram theoben on a Wim, Yeah I know!!! The main problem with those pumps is they have a lot of volume per pump, so like Scratchit said go very slowly or you will over charge it. Equipped with the precision adjustable trigger "Elite" with automatic safety. Any ideas? But engineering quality is high, and the fixed telescopic sight mount was precision-machined in line with the action and barrel. They’ve pretty much cleaned my clock, but there may be hope for this one still. The cocking effort with the short barrel is greater, however, and the Theoben silencer isn’t as effective as more modern designs. I always thought that with the right fitting, any high-pressure pump would work, I just wasn't sure. I supposed to see screw threads, correct? Will post what I've learned after ordeal is over. 22" barrel (including moderator), figured walnut stock with rubber recoil pad. issue where I’d noted he was advised to pressurize his gun to about 800 psi, I choked and raised a red flag. However, anyone used to firing a rifle will be able to retain the sight picture throughout the shot cycle. Very helpful. I now think I understand that the Theoben licensed guns made by HW, the 90 and RX types, are charged to about 25 bar (more or less) and the Theoben guns are charged to about 50 bar (more or less). I've never needed to recharge the rams, but I would like to have that ability. (and thanks JoshIII, I noted where you made mention of a barrel lockup adjustment, this could be my issue. Comes with a single block mount and a Weaver… £399 US$543/€442. Anyway, it's stamped theoben he systems and shoot surprisingly well with very little felt recoil. The rings are bolted and keyed into place, forming a solid mount on the rifle with no scope shift. A good friend has a 90 in .177 that has lived in the bottom of a wet John boat for most of its life and is still going strong at over 200,000 shots. Power is unchanging for thousands of rounds. The wood is tough and difficult to machine, and became very hard to source due to forest protection. I suspected a smaller piston or cylinder at the higher pressure. The procedure that Theoben recommended was to slowly work up to max velocity. Has anyone here done this before? © 2020 BSA Guns (UK) Ltd. Privacy & Cookies | Terms & Conditions. 1/8 BSP Male thread to fit most hoses. Gas-piston powerplant The Theoben Sirocco gas ram system. 3,048. Post Nov 11, 2009 #1 2009-11-11T06:43. VPilot. Have 2 theoben pumps for pre HE guns available. The rite of spring: Fusion vs Lightning SE, The Airgun Show – lamping rabbits with a spring-powered airgun, PLUS the Crosman Nitro Venom gas-ram on test, The Airgun Show – hunting with a spring-powered airgun, PLUS the Benjamin Trail NP2 gas-ram on test. If you decide to work on it yourself, I'd be glad to gi... Limbshaker & Ed, The fast locking time, the recoil reducing system, and stable and solid conception are outstanding features. The air rifle with the unique Theoben gas ram system. The Theoben H.E. It seems most shooters have heard of the Theoben Eliminator, Theoben Evolution, Theoben Rapid, Theoben Rapid MFR, Theoben SLR98 and Theoben Crusader. Further, I haven't seen the maximum BAR these guns operate at online. Existing valve is on the left (red band), new valve is on the right (white band). The HE system uses much higher pressure than the RX system. I did a quick search for the Brocock slim jim but I didn't find anything available. Features a quick change barrel system that allows you to easily swap calibers, an included 4x32 scope, and a gas ram powerplant. The original gas ram was a larger low pressure system which was carried over to the HW-90. Thanks. The safety is a blade ahead of the trigger, and can be taken off by pushing the trigger finger forward and reapplied at any time. Sonnysan, so which valve core worked out best between the two? An excellent condition Theoben Eliminator HE gas ram break barrel FAC rated (20.8 ft lbs) air rifle in rare.20 calibre. The newer HE system has a skinny stem at higher pressure. The HW 90 (IIRC), requires its own pump adapter - so the RXs will too. Rifles stocked with Hyedua have therefore become much sought after as a result. The overall affect is that all spring vibration, twang, and … description The air rifle with the unique Theoben gas ram system. Need help - Trying to charge up a Theoben gas ram with RFM adapter. Required fields are marked *. Theoben Gas Ram Owners has 912 members. I think the “tissue” test might be deceiving in this case. Chrono with jsb exacts for a steady reading of 11.3,it's. hi Mike, Ive used a foot pump, Hill, FX, most any asian. As JimB notes, 2 1/2 was too much and had to vent a bit. Hard Times As many of you will know Theoben fell on hard times recently and closed their doors but a new investor, Impact Airguns, took over the building, some of the equipment and the key staff members. Some are PCP rifles and some are gas ram rifles but all are super high quality products. Equipped with the precision adjustable trigger "Elite" with automatic safety. thanks, perhaps I’m beginning to see the light. Boerne (San Antonio) Field Target Club First Match of 2021 on Saturday, January 16, Nevada State Championships AAFTA GP Match- 6/11, 6/12 & 6/13, 2021, Field Target match Saturday Jan 9th at TCRC, Pleasant Hill NC, Latest Post: Air Arms S400 Repair Our newest member: lognom Recent Posts Unread Posts Tags, Forum Icons: Forum contains no unread posts Forum contains unread posts Mark all read, Topic Icons: Not Replied Replied Active Hot Sticky Unapproved Solved Private Closed. Top the gas rams below apparently there is another adapter that is smaller ( yellow ) that fits the.. To theoben gas ram system so durable the regular seal kit with jsb exacts for a steady reading 11.3. ( UK ) Ltd. Privacy & Cookies | Terms & Conditions problems with other types that use o-ring... The out-standing features `` Elite '' with automatic safety hears the name Theoben, certain rifles to! Deep blacking and beautiful African hardwood stock – and the gas ram.. 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