Ft Collins, CO --(Ammoland.com)- During the earlier part of the last century, individual military equipment, particularly rifles, light machineguns, bayonets, et al were designed with one goal in mind:
To win wars- decisively, and permanently!
Infantrymen, right down to the squad-level, were trained to, and expected to, have the ability and will, using fire and maneuver, to seize objectives by force, killing most of the enemy, and driving off the rest, all with only their own, indigenous resources. “Take the high ground, and hold it! That’s the job of …read more
DANVILLE, Ala. --(Ammoland.com)- Hunter Safety System continues to set the standard in fashionable safety harnesses for today’s lady hunters.
The new lady’s Contour has been designed to look more like a fashionable garment than a harness yet it meets and/or exceeds all safety standards set by the Treestand Manufacturers Association.
The fashion-forward design of the Contour features HSS’s own Comfort Cool liner and breathable fabrics. A front-zipper design and three separate Right-Fit™ zone stretch panels allow the vest to fit comfortably over light or …read more
ZANESVILLE, OH – T&M Tactical has partnered with Mossy Oak to offer quality, high-performance camouflage gloves with an attached light for safety and convenience while outdoors before sunrise or after dark.
Former law enforcement/tactical officers Tim Matheney and Justin Thompson have designed a pair of hunting gloves that provide hands-free use of a light source, warmth of fleece insulation and concealment with Mossy Oak Break-Up Infinity
Last year I posted a review of body armor where I tested several different plates with 5.56mm and .308 ammo. The plate that I found to be most interesting was the Midwest Armor and Strategic Solutions MASS III which only weighs a little over 3lbs and is buoyant.
They’ve released just announced they’ve received NIJ06 certification on a new armor plate called the VENTURE FM3. The new plate is a stand-alone level III plate that’s 10″x12″x1″ triple-curve with a shooters cut. “FM” stands for Force Multiplier and the 3 indicates the NIJ rating.
Gun For Hire Radio-the Voice of 1-Million New Jersey Gun Owners, is the Number-One rated talk show in the Nation. News, commentary, entertainment and education you won’t hear anywhere else. Listen, learn and laugh you’re …read more
By Matthew Cox Mission First Tactical recently announced a new line of mountable task lights made by Princeton Tec. The TORCH Backup Light is a low profile, Picatinny mounted light with dual LED’s. It has a recessed pressure pad for easy activation and a power button for simple on/off functions. “The illumination is low output for signature reduction […] …read more
The PMR-30 is a light weight, full size pistol chambered for the flat shooting .22 Magnum Cartridge (22WMR). The PMR-30 operates on a unique hybrid blowback/locked breech system. This operation system allows for the use of a wide variety of ammunition as it seamlessly adjusts between locked breach and blowback operation, depending ont he pressure of the cartridge. It uses a double stack magazine of a new design that holds 30 rounds and fits completely in the grip of the pistol.
The trigger is a crisp single action with an over-travel stop. The manual safety is a thumb activated ambidextrous safety lever (up for SAFE, down for FIRE). The slide locks back after the last shot and a manual slide lock lever is also provided. The light crisp trigger pull and fiber optic sights make the PMR-30 ideal for target shooting and hunting small game. Slide and barrel are crafted from 4140 steel, frame is 7075 aluminum. Grip, slide cover, trigger, mag release and levers are glass reinforced Nylon (Zytel) much like other Kel-Tec pistols. Magazine is also Zytel and holds 30 rounds and has round count ports. Other features include: dual opposing extractors for reliability, heel magazine release to aid in amgazine retention, dovetailed aluminum front sight, picatinny accessory rail under the barrel, urethane recoil buffer, captive coaxial recoil springs, the barrel is fluted for light weight and excessive heat dissipation. The PMR30 disassembles for cleaning by removal of a single pin.
Danger Space is one of those terms that’s been around shooting for many years but rarely seems to come up these days in defining how effective a particular load combination is. This may in part be as a result of the increase in the use of laser range finders which can pin-point the exact range to a given target for Danger Space is particularly important to the shooter aiming at an unknown or uncertain distance such as the military sniper or hunter.
To many, Danger Space is the ultimate measure of merit for a trajectory where that measure is the likelihood of hitting the target that one is aiming at.
So what is Danger Space and why is it important? In short, Danger Space is the distance over which, a given target of known height, is in danger of being hit by the trajectory of the bullet.
In the diagram above the dashed lines represent a target of known height, say 10 inches. The highlighted arrows show where the trajectory of the bullet first crosses into that 10 inch zone (after initial firing) and then also where the trajectory takes the bullet out of the 10 inch zone. It can be seen from the plot that the bullet enters the zone at say 580 yards and leaves it at 620 yards. This means that a 10 inch target would be in the Danger Space of this trajectory for 40 yards (580 to 620). Naturally the longer the Danger Space the higher the likelihood of hitting the target and this is where Danger Space starts to become critical for the shooter shooting at unknown or at least uncertain distance targets.
Let’s take the example of a military sniper. The option to laser range find is not an option. Passive surveillance, a non-reflective target, there may be any number of reasons as to why the laser range finder is out of play. So the sniper goes back to basics and starts to range the target using one of the options open to him such as using the mil-dots on his scope or bracketing or whatever it may be. What the above graph means is that with that round the sniper could be 40 yards out with his range estimation and still record a hit on that 10 inch target. This is why Danger Space is crucial to the unknown/uncertain distance shooter but of less impact to the target shooter who is invariably shooting at a known distance target. Having that latitude or leeway in calculating the range could be the difference between a hit and a miss.
So once we start to consider Danger Space and the impact, quite literally, it can have on our ability to hit a target the trajectory of the bullet and therefore the bullet’s Ballistic Coefficient (BC) start to take on a much greater significance.
A bullet with a high BC will tend to have a flatter trajectory out to a given distance than will a bullet with a low BC out to the same point, thus increasing the Danger Space. At that distance therefore, the Danger Space for the high BC bullet might be 40 yards but the Danger Space for the low BC bullet might be only 20 yards due to its much steeper angle of attack. In short, the shooter has to be much more accurate with his ranging to ensure a hit with the low BC bullet than he does with the high BC bullet.
In recent years we have seen the introduction of Very Low Drag (VLD) bullet designs with extremely high BC’s that have given some of the more traditional rounds such as 50 BMG a new lease of life when it comes to a longer, flatter trajectory. Many of these VLD bullets have extended the effective range of these calibres by increasing the Danger Space at longer ranges.
Where Danger Space becomes interesting is to understand how it changes over the course of the trajectory. A fast flat light round at 300 yards maybe dropping like a stone at 600 yards whereas a slow heavy round, with a higher BC, may have a relatively worse Danger Space at 300 yards but a relatively better one at 600 yards. In his book Applied Ballistics for Long-Range Shooting; Bryan Litz illustrates this by comparing the 220 Swift round to the 243 Winchester. At 700 yards the .243 Winchester has a Danger Space of 37 yards compared to 27 for the 220 Swift. A 37% difference in favour of the heavier, slower round.
So what does all this mean? Well, if you only shoot at known distance targets, not much to be honest, but if your shooting entails engaging targets that are at unknown or uncertain distances, then knowing the Danger Space of the trajectory of the round you’re shooting could make all the difference.
This and other blogs can also be found at http://www.figure14.com
Figure 14 Ltd is a partner of THOR Global Defense Group and Knesek Guns importing large calibre precision weapons from THOR and EDM into the UK.