The CG INCH rifle action is the newest design to be available to the target shooter in many years. It incorporates many new features, including a modern three lug rear locking system, internal primary extraction, Sako type extractor and precision concentric bore and barrel tenon. Past issues of case stretching are impossible in this design due to the massive receiver cross section, and probably the heaviest bolt in any single shot rifle action of this size.
Coupled with the CG UNI trigger manufactured by X-Treme Shooting Products LLC, of Ohio USA, the CG INCH will match any other rifle action in prone type shooting. The CG INCH is equally at home on a Palma or F Class type rifle.
The 30 degree cone breech is extremely effective at guiding the cartridge into the chamber with no fuss. The short bolt throw makes reaching the loading port easy, and the rear locking design allows both the very long barrel tenon (35mm or almost 1 1/2 inch) and brings the balance point of the barrelled action at least 25mm or one inch further towards the shooter. This makes a better balanced rifle, and one that can be used easier than all other typical front locking actions.
The CG INCH is already making a name in long range shooting; that being over 800 yards ranges. In the short time the CG INCH has been in use, both in prototype and production form, top performances have been seen. Top 10 finishes in the Grand Aggregate at the UK Imperial Meeting Bisley, range medals and division wins in Queens Prize events at state level in Australia to name some. The CG INCH at long range is the equal of any rifle action made.
A detailed description and specifications can be seen HERE;
The INCH system of rifle actions was conceived by Robert Chombart (who also designed the various C.Gs, RPA 2000 ad Quadlocks and the Millenium actions amongst others), as well as the CG Triggers now manufactured by XTreme Shooting Products in USA. He also designed the CG Centra line of high precision Target sights for Smallbore and Fullbore.
The INCH concept was developed by Robert Chombart on an original idea shared with Laurie Ingram, who was the co-designer with George Swenson, of the legendary world beating SWING rifle action back in 1969.
Detailed development history of INCH actions by Robert Chombart (edited by Laurie Ingram) can be seen HERE.
The INCH 3 lug rifle action has a massive cylindrical receiver, with locking situated at the rear. The dimensions coupled with the innovative locking system, allows the incorporation of dual minimum toleranced barrel locations and shoulders: one at the front of the exceptionally long threaded section, and one at the rear - the threads serving solely for tightening down onto the internal diaphragm and external shoulder, and not for centering the barrel, this being accomplished by the use of two cylindrical registers.
The rear lug configuration allows for a reduction of around 30% of Bolt travel in comparison to conventional front locking. Cartridges up to the .338 Lapua Magnum length can be fed if desired, with the action length remaining the same as for the 308W and its derivatives. The barrel fixing system allow a quick and precise exchange of barrels, each one keeping its initially zeroed point of impact. The bolthead face is conical, fitting very closely indeed into a corresponding female cone in the rear face of the barrel. Because of the absence of conventional forward lug recesses in the action, the feeding of the cartridge into the barrel is a delight, without any hindrance whatsoever.
The design has purposely allowed plenty of 'meat' on the bolthead for a magnum-sized Bolt face, including .338 Lapua Magnum sized case heads. The design has been conceived to include the option of the fleXibed® bedding system. The action will also fit the HHE Millenium fleXibed stock. Alternatively, a more conventional epoxy pillar bedding interface may be employed, with the rear edge of the receiver easily fulfilling the function of recoil lug, due to the massive area available. This in turn means that the recoil is absorbed most near parallel to the axis of the action and no potentially weakening nor distortion of the action due to the addition of a recoil lug amidships or forward. Bolt to receiver locking is ensured by 3 rear locking lugs forming a triangular section with rounded apexes, these lodging into corresponding triangular lug recesses in the receiver.
This system ensuring a safety, lug shear sections and bearing areas hitherto unseen in a competition rifle action, also ensures the greatest lug bearing angle possible, superior by a large percentage to those of more conventional lug shapes and arrangements. The change from 4 lugs (Tetra) to 3 (Delta) has allowed the orientation of the lugs so that all three are unaligned with necessary openings such as feed port and trigger slot, etc. At the same time, the 60° opening angle reduces the forces within the cocking system and therefore eases the bolt opening effort.
The short overall length of the bolt in the fully open position is important because this allows the use of a long cheekpiece at the comb of the stock without the need of a slot to enable bolt removal. Total bolt travel: 85mm
The bolt body also possesses cross sectional thicknesses yet unseen in such an arm. This, together with the dimensions of the receiver mentioned above, results in a rigidity as yet unequalled in a small calibre match action. Bolt removal is easily acheived by rotating a further 30° when at its rearmost travel position. Primary extraction travel of some 2mm is assured by camming on the bolt itself reacting against the fixed bolt stop. This unique feature (patent pending) combines safety with logical functioning. The percussion system (patent C.G.) using special high-performance stainless steel Belleville disc springs, has been further revised, as well as lightened, by a reduction in diameters resulting in a new generation of the genre, as well as allowing much thicker sections within the Bolt body, with an even faster lock-time by a significant reduction of inertia. The firing pin comports two tips and is reversible. It can be reversed within seconds.
The trigger employed is the completely new C.G 'Universal' which, due to a modular design, can be fitted to virtually any Match or sporting action worldwide (including Remington 700 and derivates, Tikka/Sako, Winchester 70, Swing-Paramount, RPA…). The 9 adjustments covering practically all the possibilities needed for an extended range of weights of pulls, be they single or TRUE two-stage. All final adjustments are from under the action, not requiring the removal of the action from the stock. All adjustments being equipped with thread brakes, resulting in permanent settings. The INCH action is intentionally not fitted with an ejector, as TR, MR and F-class shooters habitually remove their empty cases manually to avoid these falling into the dirt of the range. This allows for an uncluttered bolthead without any weakening slots whatsoever, and permits the use of a generously sized extractor.
Detailed development history of INCH actions, written by Robert Chombart (edited by Laurie Ingram), can be found by clicking HERE.
For detailed INCH Specifications please click HERE.