Showing posts with label Military Surplus. Show all posts
Showing posts with label Military Surplus. Show all posts

Monday, November 15, 2010

Military Snowshoe Assembly and Use


The toe strap installed by itself.

The heel binding installed by itself.

The heel and toe bindings installed together.

Strapping in the toes.

The bindings correctly installed and ready for use.

Snowshoe in use showing proper binding range of motion.
We got a great deal on these lightweight military-surplus magnesium snowshoes, but before you head off on an exciting winter adventure you'll need to make sure that the bindings included with the snowshoes are properly installed. Though it can seem intimidating when you're staring at a tangle of webbing and latches, the actual installation process is easy and straightforward.

First, take the shorter of the two strap sizes, the toe straps, and string them through the webbing just behind the toe gap as indicated in the photo to the left. Next, take the larger of the straps and lay it out flat. These ankle straps are secured to the snowshoes by way of two straps that thread through the snowshoe webbing on either side of the toe strap. These straps are threaded through and then looped back through the locking ratchet.

At this point, you are ready to strap your boots into the bindings. With the ankle strap (the rear strap) laid out to the rear, place your foot onto the snowshoe and fasten the toe strap over your foot using by threading the strap through the locking ratchet. Next, pull the rear strap up to the rear of your ankle and then wrap it around your ankle and fasten it though the locking ratchet.

Tighten down the toe and ankle straps until they are snug but not so tight that they inhibit movement of blood flow. Adjust the length of the ankle strap for your foot size by loosening or tightening the ankle straps where they attach on either side of the toe strap.

Check for proper movement as indicated by the lowermost image on the left. The heel of your foot should be able to pivot up with the heel strap while your toes pivot down through the toe gap. Perform the above binding installation process and verify proper range of motion on your other foot, and you're ready to go!

For even more information on the proper use of these snowshoes, we're including the following excerpt from the Army Field Manual 31-70


Section IV. MILITARY SNOWSHOEING
4-36. Purpose and Scope

a. Snowshoes are individual aids for oversnow movement. Like skis, they provide flotation in snow and are useful for cross-country marches and other activities which require movement in snow-covered terrain.

b. The snowshoe is an oval or elongated frame braced with two of three crosspieces and the inclosed space filled with a web lacing. A binding or harness attached to the webbing secures the wearer's foot to the snowshoe. Flotation is provided by the webbing, which is closely laced and prevents the snowshoe from sinking too deeply into the snow when weight is placed upon it. Depth and consistency of snow will determine the amount of support obtained on the snow cover and the rate of movement.

c. Snowshoes are particularly useful for individuals working in confined areas such as bivouac sites and supply dumps, for drivers of various types of vehicles, gun crews, cooks, mechanics, and for similar occupations where aids to movement in snow are necessary. Transporting, carrying, and storing snowshoes is relatively easy due to their size and weight. Maintenance requirements are generally negligible and little skill is required to become proficient on snowshoes. However, the requirement for physical conditioning is as great, or greater, as that needed for skiing. The use of snowshoes when pulling and carrying heavy loads is particularly practical, as the hands and arms remain free. On steep slopes, however, the use of snowshoes is considerably limited because traction becomes negligible and the snowshoe will slide, causing loss of footing. Generally, the rate of movement in any type of terrain is slow because snowshoes will not glide over the snow. The gliding properties of the ski are not obtained with the snowshoes; this adversely affects the amount of time and energy spent in movement. In deep snow the trailbreaker must be changed frequently. Especially when wet, snow tends to stick to the webbing, thereby adding weight to the snowshoe.

d. There are three types of standard issue snowshoes: the trail, the bearpaw, and the magnesium. They can be used with all types of winter footgear. The trail snowshoe weighs approximately 6.5 pounds, the bearpaw, 5.5 pounds and the magnesium, 4.6 pounds.

(1) Trail. The trail-type snowshoe is long, with a rather narrow body and upturned toes (fig. 4-29). The two ends of the frame connect and extend tail-like to the rear. The turned-up toe has a tendency to ride over the snow and other minor obstacles. The excellent flotation provided by its large surfaces makes the trail snowshoe best for cross-country marches, deep snow conditions, and trailbreaking.



(2) Bearpaw. This type of snowshoe is short, wide, and oval in shape, with no frame extension (fig. 4-30). The bearpaw snowshoe is preferable to the trail type for close work with weapons and vehicles, in heavy brush, and in other confined areas. Carrying or storing is also easier.



(3) Magnesium. The magnesium snowshoe is the lightest and most durable of the three types (fig. 4-31). The snowshoe has a magnesium frame with the center section made of steel, nylon-coated wire. The magnesium snowshoe is 17.70 cm (approx 7") shorter than the standard wooden trail snowshoe but is 9.50 cm (approx 4") wider giving it approximately the same flotation characteristics.



e. The trail and bearpaw snowshoes have their own individual bindings, however, the, "Binding, Snowshoe, Bearpaw and Trail Type" has been developed for use on all three types. This binding consists generally of a toe strap and a heel and instep strap. The straps are made of nylon and are secured by keepers and cam lever quick-release buckles. The method of securing the binding to the magnesium snowshoe is snown in figure 4-32.



4-37. Care and Storage of Snowshoes
a. Care. Snowshoes must always be kept in good condition. Frequent checks are necessary, particularly of webbing and binding, because individual strands may be ripped or worn out. Repairs must be made immediately, otherwise the webbing will loosen and start to unravel. If unvarnished, the rawhide webbing on wooden snowshoes will absorb moisture, stretch and turn white, particularly in wet snow. It should be dried out slowly, avoiding direct flames, and be revarnished at the first opportunity. Wooden frames may fray from hard wear and should be sanded and varnished. When needed, other minor repairs should be made as soon as practicable. When snow cover is shallow, care must be taken not to step on small tree stumps, branches, or other obstacles, since the webbing may be broken or damaged. Stepping into water is to be avoided; the water will freeze and snow will stick to it. When not in use in the field, snowshoes are placed in temporary racks, hung in trees, or placed upright in the snow. They should be kept away from open fires and out of reach of rodents.

b. Storage. In off-seasons, wooden snowshoes are stored in a dry, well-ventilated place so that the rawhide will not mildew or rot and the frames warp. Each snowshoe is closely checked for possible damage, repaired if needed, and revarnished. As in the field, snowshoes are protected against damage and from rodents. Magnesium snowshoes are cleaned and repainted if necessary. Webbing is examined and repaired or replaced if needed.

4-38. Snowshoe Technique
a. A striding technique is used for movement with snowshoes. In taking a stride, the toe of the snowshoe is lifted upward, to clear the snow, and thrusted forward. Energy is conserved by lifting it no higher than is necessary to clear the snow and slide the tail over it. If the front of the snowshoe catches, the foot is pulled back to free it and then lifted before proceeding with the stride. The best and least fatiguing method in travel is a lose-kneed rocking gait in a normal rhythmic stride. Care is taken not to step on or catch the other snowshoe.

b. On gentle slopes, ascent is made by climbing straight upward. Traction is generally very poor on hard-packed or crusty snow. Steeper terrain is ascended by traversing and packing a trail similar to a shelf across it. When climbing, the snowshoe is placed as horizontally as possible in the snow. On hard snow, the snowshoe is placed flat on the surface with the toe of the upper one diagonally uphill to get more traction. In the event the snow is sufficiently hard-frozen to support the weight of a person, it is generally better to remove the snowshoes and proceed temporarily on foot. In turning around, the best method is to swing the leg up and turn in the new direction, as in making a kick turn on skis (fig. 4-33).



c. Obstacles such as logs, tree stumps, ditches and small streams should be stepped over. Care must be taken not to place too much strain on the snowshoe ends by bridging a gap, since the frame may break. In shallow snow there is danger of catching and tearing the webbing on tree stumps or snags which are only sightly covered. Wet snow will frequently ball up under the feet, interfering with comfortable walking. This snow should be knocked off with a stick or pole as soon as possible. Although ski poles are generally not used in snowshoeing, one or two poles are desirable when carrying heavy loads, especially in mountainous terrain. The bindings must not be fastened too tightly or circulation will be cut off, and frostbite may occur. During halts, bindings should be checked for fit and possible readjustment.

4-39. Training
Snowshoe training requires little technical skill. However, emphasis must be placed on the physical conditioning of the individual and the development of muscles which are seldom used in ordinary marching. The technique, as such, can be learned in a few periods of instruction. Stiffness and soreness of muscles are to be expected at first. The initial training should be gradual with regard to loads carried and distances covered. It should be progressive, with ample time allowed for the individual to acquire physical proficiency, gradually increasing the distance covered and weight carried or pulled. Overcoming obstacles such as dense brush, fallen timber, and ditches should be emphasized during training. Trailbreaking, with frequent change of lead man, should also be stressed. Snowshoe training can be accomplished concurrently with other training requiring individual cross-country movement.

Wednesday, March 3, 2010

Military Surplus Ammunition

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Ammunition availability is something that all experienced shooters consider when purchasing a new firearm. For many shooters, choosing a firearm chambered in a caliber identical or nearly identical to a common military caliber is an obvious choice. This is because there is often an abundance of military surplus rounds available on the civilian market, making ammunition cheaper as well as easier to find. The fact that a given caliber had previously been chosen by the military for use in their weapons means that bullets, brass, and other components used to manufacture the round will often be more readily available to the civilian market. What's more, it is not unusual for firearm manufacturers to release civilian legal versions of their military arms that are chambered in the same caliber, further increasing demand and production of ammunition in that caliber by commercial manufacturers.

What do you need to look for and keep in mind when purchasing military surplus ammunition?

First, be aware that almost all military surplus ammunition will be ball or FMJ (full metal jacket) ammunition. The Hague Convention agreement of July 29 1899 stipulates that signatories to the agreement "agree to abstain from the use of bullets which expand or flatten easily in the human body, such as bullets with a hard envelope which does not entirely cover the core, or is pierced with incisions." For this reason, The United States and all other participants in the treaty agreed not to use any form of hollow point or other expanding ammunition. Military surplus ball ammunition is perfectly fine for target practice and training, but is not particularly effective nor is it recommended for hunting or personal defense.

Military surplus ammunition is very often loaded to different pressures than commercial ammunition in the same caliber. Commercial 9mm (9x19) ammunition is much less powerful than 9mm ammunition loaded to military specifications. By contrast, the 7.62 NATO, often used interchangeably with .308 Winchester, is actually loaded to a lower pressure (12,000 psi less) than the civilian .308 version that has become popular as a hunting round.

Other military calibers are loaded to similar pressures as their commercial counterparts, but critical differences in case dimensions can prove problematic. Take the well known 5.56mm NATO round. This is commonly called a .223 round, but there are critical dimensional differences between the .223 and 5.56mm rounds that can be catastrophic in certain circumstances. Dimensional differences in the two rounds as well as the resulting high pressures in the wrong chamber make the 5.56mm cartridge potentially dangerous to shoot in a rifle chambered in .223. The .223 round on the other hand may be safely fired in any rifle chambered for 5.56mm NATO. The .308 Winchester and 7.62 NATO cartridges also have dimensional differences, primarily with regard to headspacing, but these differences make firing .308 Win in a rifle chambered for 7.62 NATO inadvisable instead of vice versa like the 5.56/.223 situation. Still, modern shooters should be aware of this since their older M1A rifles are not necessarily designed for the higher pressures of the .308 Winchester round. That being said, I'm not aware any of older rifles chambered in 7.62 NATO failing due to the use of modern .308 Winchester cartridges.

Surplus ammunition is often labeled by paint that is applied to the tips of the bullet. Red or orange tipped ammunition generally indicates that the ammunition is loaded with tracer bullets that glow while in flight. Green tipped ammunition, usually found on surplus 5.56mm NATO ammunition, generally indicates that the bullet has a steel penetrator core. Black tipped NATO ammunition usually means that the ammunition is armor piercing. Silver or aluminum tipped ammunition indicates that the round is armor piercing and incendiary when found on the .50 BMG round. This should not be confused with silver tipped surplus 7.62x54R ammunition, which is used to designate standard ball ammo. .50 BMG that is blue tipped is incendiary but not armor piercing. There are a number of other paint designations for various specialty rounds, but those listed above are the most common ones found military surplus bullets. Bullets with no paint markings are usually just full metal jacketed lead core ball ammunition.

Some older mil-surp ammo, especially ammunition from old ComBloc states is corrosive. Corrosive ammunition functions fine in modern arms, but care must be taken to clean firearms after shooting corrosive ammunition in order to remove corrosive salts that can quickly damage the bore and action of a gun. For more information on corrosive ammunition and how to clean it, see our article located here. Some people express concern at shooting ammunition that has been stored on a shelf for some 40 years or more. But the fact is, military ammunition is manufactured to last. Provided it is not submerged in water or coated with oil for an extended period of time, 40 year old surplus ammunition will function just as well as the day it rolled out of the factory. With regards to corrosive ammunition, there's nothing to be concerned about there either. The corrosive salts that can damage your gun have no effect on the actual ammo cartridge itself. The corrosive components are in the primer of the round and are not released until the round is fired. Some military surplus ammunition may have discoloration on the bullet or brass but this is not something to be concerned about either.

Military surplus ammunition is not suitable for all firearms. But if you have a plinker or old surplus rifle that you're looking for cheap and abundant ammunition for, it's hard to go wrong with mil-surp ammo.