.44-40 Winchester, .45 Colt, .22 Magnum, and .22 Long Rifle. NRA High power semi-automatic military rifle Any center fire, selfloading rifle, as issued for general service by the armed forces of any nation, or the same type and caliber of commercially manufactured rifle, having not less than trigger pull, with standard type stock. In all courses, the standard box magazine is attached. Hinged butt plates, if installed, are only used in the folded position. Rubber recoil pads may be used. Gas systems, if any, are fully operational. External modifications are not allowed. The application of synthetic coatings, which includes those containing powdered metal, to the interior of the stock to improve bedding is authorized provided the coating does not interfere with the function or operation of safety features. The front and rear sights must be of original design, but may vary in dimensions of rear sight aperture and front sight blade. The internal parts of the rifle may be specially fitted and include alterations which will improve the functioning and accuracy of the arm, provided such alterations in no way interfere with the proper functioning of the safety devices as manufactured. (6 mm or larger caliber. Any magazine may be used and may be included in the grasp). Cartridges Rifle silhouette cartridges NRA rules for high power (silhouette and hunter) permit rifles in caliber 6 mm or larger, provided no belted cartridges or magnums are allowed. Common calibers can be thought of as in the deer hunting, target shooting and bench rest range. .243 Winchester, 6mm Remington, 6mm BR, .260 Remington, 6.5mm Creedmoor, 6.5×55mm, 6.5x47, 6.5 TCU, .270 Winchester, 7mm-08 Remington, 7mm BR Remington, 7mm TCU, 7x57mm, .30 TC, .308 Winchester, and .30-06 Springfield. The limiting factor is the balance between amount of recoil and the ability to retain enough energy to knock the rams over at 500 meters. Handgun silhouette cartridges Handgun cartridges aim to find a balance between comfortable recoil and being able to knock down the ram targets at 200 meters. Some common cartridges in Production are .357 Maximum, .300 Blackout, 7mm TCU, 7mm BR, .44 Magnum, .30-30 Winchester and .30 Herrett, while some common cartridges in Unlimited are 6mm BR, 7mm BR, 6mm TCU, 6,5mm TCU, 7mm TCU, 6×45 mm Rem and 6.5 mm Grendel. Other equipment Ear protection and eye protection is mandatory. Spotting scopes and binoculars are commonly used. Gloves are only used for