How Altitude and Pressure Affect Your Multi-Pump Gun
Did you know that altitude and pressure will affect your pump gun? Airgun manufacturers will typically impose a one to 10 time pumping maximum on their multi-pump airguns based on standard day conditions and maximum valve pressure. The pump limit is meant to preserve seals, reduce wear and tear and prevent valve lock. It’s a guide, but not necessarily an absolute.
When the air is thin, multi-pumps have little to compress and therefore get weaker at higher altitudes. There is less air for them to compress and store. That can be offset by pumping more to compensate. For instance, if you live in a mountain state and have an Umarex Next Generation APX or Daisy 880 for instance, you may have to pump 12 to 15 times to achieve the same velocity that 10 pumps produces on a normal day at sea level. On the flip side, if you’re in Death Valley on a winter night just seven or eight pumps might suffice for the same velocity achievable at sea level with 10 pumps.
Pump Guns are the Most Useful of Airguns
Pump guns are the most useful of airguns. Why? You can adjust the pressure at any altitude or temperature to achieve the same velocity without any extra gear just by altering the number of pumps. Pneumatic pump guns don’t require CO2, which is affected by temperature and you don’t have to worry about density altitude like in fixed volume break barrel spring rifles.
Always Use Caution with Pump Guns
Whether you pump just one or two times or experiment to find out how many pumps your gun takes to reach its maximum velocity where you live, be aware that just one pump will send a projectile flying at dangerous speeds. One or two pumps can cause serious injury or property damage. No matter how many times you might pump your airgun, ALWAYS keep the muzzle pointed in a safe direction. Don’t aim or point the gun at anything other than a target or object intended to be used as a target.
by Chip Coone
Chip Coone is a writer for Umarex USA, Inc. The writings of Chip Coone are not representative of Umarex USA, Inc. or its affiliates or parent companies and are the opinion or reflection of Chip Coone.
Airgun hunting is probably allowed in your state. However, you will need to check on restrictions and allowances with your state’s game and fish authority. This article provides guidance on general airgun hunting rules at the time of writing. Because regulations change frequently, check with your game and fish authority each season before you go airgun hunting.
Airgun Hunting Overview
After Rossi Morreale‘s recent turkey hunting trip in California with American Airgunner TV, we have been receiving a lot of questions. The biggest question is can I hunt with airguns in my state? This changes from state to state. Most states will only allow small game to be taken with air rifles. While a few others will allow larger game, such as Whitetail Deer, to be taken. Some states, such as Arkansas, don’t specifically allow airgun hunting. However, they do allow airguns to be used to “hunt” pest animals such as the crow, rabbit, and squirrel. As of right now, only two states do not allow airgun hunting of any kind: New Hampshire and Pennsylvania. There are only four states that specifically allow airgun hunting for turkey: California, Maryland, Michigan, and Virginia.
Airgun Hunting Map
This map is based on interpretation of existing regulations. Do not depend on this map for airgun hunting laws. Always check local regulations with your state’s game and fish group before hunting. The states marked in yellow have special rules for airguns which are explained below the map.
For information purposes only. Regulations will change over time. Remember to check your game and fish group every season for updates.
Arizona: Must use a .22 or larger for fur bearers.
Hawaii: Can only hunt with airguns on private property with permission from the owner.
Illinois: Can only hunt with airguns on private property with permission from the owner.
Kansas: Cannot use airguns to hunt bullfrogs or turtles.
New Jersey: Must use an airgun that is at least .177 but no larger than .22. Velocity must be at least 600 FPS.
New York: Must use an airgun that is .177 or larger. Velocity must be at least 600 FPS.
*North Carolina: According to the North Carolina Wildlife website, air rifles fall in the rifle category. All restrictions that apply to rifles apply to air rifles.
Rhode Island: Must use an airgun that is at least .177 but no larger than .22. Velocity of at least 750 FPS and pellets 7.5 grains or larger.
South Dakota: Must use an airgun with a velocity of at least 1,000 FPS. Only hunting pellets are permitted. Read page 41 of the SD Hunting Handbook for legal game.
Texas: Must use an airgun that is at least .177 with a velocity of at least 600 FPS when hunting squirrels.
View Airgun Hunting Regulations by State
Looking to have a great time outdoors with your kids (or anyone for that matter)? Then pull out the airguns because that’s exactly what Tim from Airgun Hobbyist did. Tim threw quite the birthday party for his 14 year-old son, Ben, at their North Carolina home. The party lasted over four hours and saw 1000 pellets and BBs fired downrange with 30 different airguns and hundreds of different targets to choose from.
They started by preparing their home made range with some painted targets consisting of over 200 empty CO2 cartridges, 50 vegetable cans, dozens of soda cans, 80 water balloons, ice targets and a few rotten eggs. They also set up a few commercial targets including the center piece, the Right Now Range that held Shatter Blast targets, soda cans and some large bulls eye targets.
The targets were placed a minimum of 30 feet away from the firing line and each guest was given safety glasses to wear in case of a ricochet and were of course instructed on safety rules. Backstops were also used behind the targets to protect any wildlife they may have been wandering through.
There were many Umarex airguns at this little party including the Colt Peacemaker, Colt Commander, Colt Python, Walther PPQ, Walther PPS, Walther CP88, a S&W 586 and a Makarov. The Umarex Fusion took down quite a few long range targets and was fired for a fairly long time without needing to replace the CO2.
The Umarex Steel Force and the M712 weren’t as lucky though. The CO2 was constantly being replaced because everyone wanted to shoot them! The M712 was the favorite in full auto mode, and the Steel Force was another favorite with its six round burst mode.
The biggest hit was the Walther Lever Action western style rifle, which felt right at home in this shooting gallery style range. The Umarex Morph 3X was another favorite with its ability to “morph”. It made a great choice for shooters of all sizes.
Everyone left with a smile on their face and comments such as “We should do this more often!” The family also got to enjoy some private shooting time knocking down the remaining targets the next day before clean up.
If you didn’t think our airguns were great before, you’ll definitely think so now. Umarex has claimed 5 of the 12 spots in Tactical Life’s Top 12 Air Rifles From Gun Buyer’s Guide 2015.
The Umarex Fusion is a single-shot rifle and uses CO2 valve technology and Umarex’s SilencAir 5-chamber noise dampening system to create an amazingly quite airgun. The Fusion takes a 12 gram CO2 capsule, has an average FPS of 750, and also features a light weight synthetic stock. The Fusion also comes with a 4X32 scope included, helping you to create a remarkably accurate airgun.
Umarex Morph 3X
The Umarex Morph 3X has the awesome ability to morph from a rifle to a pistol, giving you two airguns in one! The Morph 3X has a built in 30-shot magazine and Fiber Optic sights. The gun is powered by a 12 gram CO2 capsule and has a velocity of 600 FPS as a rifle and 450 FPS as a pistol. The Morph 3X has a synthetic stock with a light weight design that makes the gun easy to handle and the “Morphing” process is done easily by any airgunner.
The Umarex Octane is one of two break-barrel rifles first introduced under the Umarex brand. The Octane is powered by the ReAxis Reverse-Axis Gas Piston, which is unique because this piston operates in reverse of other gas pistons. A magnum velocity air rifle, the Octane can reach up to 1450 feet per second with an alloy pellet. It is equipped with a SilencAir suppressor with five chambers that significantly reduces muzzle noise. The Octane also comes with a 3-9X40 scope, all-weather stock, and adjustable 2-stage trigger.
Walther Lever Action
The Walther Lever Action is a CO2 powered rifle and has a rifled blued barrel (and receiver) and is made with elegant hardwood that is smoothly formed with a classic straight stock. The Lever Action rifle is equipped with an adjustable rear sight and an 8-shot rotary magazine and has a FPS of 630.
Walther LGV Competition Ultra
The Walther LGV Competition Ultra is a reintroduction of the original Walther LGV, which was a match rifle manufactured in the late ’60s and early ’70s. The LGV has a 3 lb trigger that can easily be adjusted to suit your preferences. This rifle, while having the power for hunting, is also accurate enough that you can expect to be hitting bullseyes all day long. The LGV is also equipped with its “Vibration Reduction System” and “Super Silent Technology”, which means no spring noise, no creaks, no groans, and an exceptionally smooth shot cycle.
See our full line of Air Rifles at www.umarexusa.com/Air-Rifles
The Umarex USA Service Department typically receives one or two break barrel rifles per week that have upward bent barrels. At first, this might seem like a strange phenomenon. After all, to cock a break barrel rifle, one typically has to pull down on the barrel of the gun, not up. Why, then, would we see so many upward bent barrels?
This upward bending of the barrel occurs when a person has the gun in an open cocked position, safety OFF, and then pulls the trigger. The result of this situation is that the barrel slams shut with extreme force and bends the barrel upwards. After this occurs, the gun may or may not cock depending on what sort of internal damage has occurred. When this situation happens, we suggest not firing the gun again until it has been evaluated by our qualified gunsmiths to see how the problem might be fixed.
The rifle most likely will not be able to be sighted in due to the barrel pointing in a slightly upwards direction. Many times the trigger tongue will be broken and the stock may be cracked at the pistol grip area when the rifle has been discharged in this way. In most situations, our gunsmith can disassemble the rifle and adjust the barrel back to its original position with the use of our barrel press. The barrel press is an extremely large, heavy press that exerts a tremendous amount of force on the barrel to straighten it out. The press itself is a fundamental tool to any quality gunsmith.
The rifle is reassembled and test fired after the barrel is straightened.
After the barrel is adjusted to once again be straight, the rifle is reassembled by our gun techs, and then it goes directly to our shooting range to fire several pellets in order to ensure it will properly sight in. We do initial testing on the gun range and sight the rifle in to be accurate. After the rifle’s quality has been ensured, we take care to properly clean and service the other aspects of the rifle before returning the gun to its rightful owner.
To prevent this situation from ever occurring to you, please always practice safe gun handling, making certain that the gun is on Safe and your finger is not within the trigger guard area until a safe target has been acquired. Only after a target has been sighted should the gun’s safety be moved to the fire position and your trigger finger placed inside the trigger guard area. Following these steps will ensure that your gun is never damaged and no one is injured in the process.
We can be reached between the hours of 8 AM and 5 PM CDT. Please feel free to call us any time at (479) 646-4210 option 7 if you have a question about one of our products or send us an email via our contact us page.
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