Perhaps it would be more accurate for me to say that porting does work to reduce shotgun recoil, but it doesn’t do it enough to matter. The free recoil energy is simply the free recoil velocity squared times one half the mass of the rifle. If you don’t feel good, you have too much recoil. After you input the necessary data such as the bullet weight, bullet velocity, powder charge weight, and the firearm weight it will output the recoil impulse, recoil velocity, and the recoil ⦠of recoil to your shoulder and face through the same gun. For every pound less in gun weight you are swinging, your shotshell load is going to be transferring significantly more recoil to your body. Of course, it’s much easier to just go to one of the online recoil calculators. Plug in these numbers in the recoil calculator above: 158 gr bullet, 13 gr of powder, 0.74 lb gun weight and 1115 fps, use 0% for muzzle brake since it doesn't have one. That is, if you increase the weight of a 7 pound gun by 10 % to 7.7 pounds, you will lower calculated free recoil by around 10%. of free recoil is about all any 200-pound person can repeatedly withstand in a 50 to 100 target event without having his scores begin to erode. It’s that simple. Shotgun Recoil Energy, Impulse & Velocity Calculator. load weight in ounces, the muzzle velocity. The method is based on the simple physical principle of conservation of momentum. The recoil calculator at beartooth bullets shows that the shotgun is way heavier recoiling. Recoil Energy Calculator Use this calculator to calculate the recoil on you rifles, handgun, and other firearms. You can input specifics for your ammunition (e.g. EXAMPLE: How much Free Recoil Energy would be developed by an average length shotgun weighing 7 pounds firing a 12 ga 2¾ - 3½ load of No. Only 3 left in stock - order soon. Recoil. 1/1. In the shooting sports we call that reaction recoil or "kick." 100 straight dead mule recoil reducer. Tom Roster is an independent ballistics consultant and author specializing in the design and testing of shotshell loads for U.S. shotshell and reloading components manufacturers. Recoil energy calculator This program calculates the recoil energy when you shoot a shotgun. This assumes that the 20 gauge is a 6.5 lb gun and the 12 gauge is a 7.5 lb gun. Lowering the recoil of the gun will help, but will not cure, a poorly fit gun. of free recoil, at 1250 feet per second about 23 ft./lbs., and at 1300 feet per second almost 25 ft./lbs. 2 3/4 inch AA or STP shells at 1200 Ft. per sec. You might get away with more if you go to a gas-operated autoloader, but even then 17 ft./lbs. of free recoil. It contributes a great deal to proper gun alignment and, if excessive, will cause the recoil to be more noticeable. Letâs use that formula now to look at the amount of recoil shooters are experiencing versus gun weight. The choice is yours. He is a court-recognized shotshell/shotgun expert witness. You need JavaScript enabled to view it. Shotgun Life is the first online magazine devoted to the great people who participate in the shotgun sports. Share your build. If you need more velocity to help your âleads,â then shoot one ounce or lighter loads in the same eight-pound gun. If you run the numbers on your gun using a 15.5 gain powder charge and a weight of 29.2s for the wad, plus 383 grains for the shot, you’ll find you have 12.77 ft/lb of recoil on your gun with the shells you describe. Porting certainly does shoulder reduce recoil on high power rifles and pistols. (in stock) 3.0 (2) Itâs what you have to do if you want to shoot 1300 or so feet per second loads and not have them erode your shooting. There are two ways to measure recoil: Subjective and Objective. Recoil Calculator at HuntAmerica.com. However, this can be automatically converted to compatible units via the pull-down menu. You'll discover ways to improve your shooting, learn about the best new products and how to easily maintain your shotgun so it's always reliable. Increasing the weight of the gun will reduce recoil on about a 1:1 basis (sort of). It’s also called Free Recoil. The deer kicks his butt. Roster spends about 100 days afield each year testing lead and nontoxic hunting and target shotshell loads, then traveling worldwide reporting on his findings to industry and wildlife professionals, hunters and shooters, and in his writings for various shotgunning magazines. Thatâs because decreases in shot charge weight have the most significant effect on decreasing recoil. Everything you need to know about the shotgun sports is a mouse-click away. Recoil Energy in foot pounds = (Bw Mv + 4700 Pw)” / 64.348 Gw where Gw = weight of gun in pounds, Bw = weight of the ejecta (shot and wad) in pounds. 03 Sniper03, Mar 1, 2019. addy8fd8885eca91d112c27f3bba1461f722 = addy8fd8885eca91d112c27f3bba1461f722 + 'charter' + '.' + 'net'; At 1300 feet per second, a one ounce load would only be transferring about 20.41 ft./lbs. Only 7 left in stock - order soon. The Technoid writing for Shotgun Report, LLC Now, check out this 12 Gauge shell with a 1 oz slug and 1,560 fps muzzle velocity. Now, put down the rest of the measurements on the formula below to get the desired result. For those who have shot both, preferable from an interchangeable barreled gun, do you find this to be true? Gun Recoil Formulae DISCLAIMER. Honest. That includes places to shoot, ways to improve your shooting and the latest new products. Maybe I’m just too insensitive. Perhaps the difference is that the rifles and pistols work at very, very much higher pressures at the muzzle than do shotguns. And that, my friends, is a recoil level any man, woman or child with a body weight of 125 pounds or more can comfortably shoot 100 rounds a day â every day â and never develop recoil-related flinches or eye-shutting. Tom was formerly the Ballistics Research Director at Oregon Institute of Technology and then served as a Ballistics Specialist for the Dept. It can be measured or computed empirically and has been for this recoil table. Mar 1, ⦠I’ve shot some serious rifles with muzzle brakes and they do work. Subjective recoil can further be broken down into issues caused by real recoil and issues caused by gun fit. Hartmann’s Hint #75: COVID-19 and The Mental Game, Clay Target Nation, December 2020, (20-21). document.getElementById('cloak8fd8885eca91d112c27f3bba1461f722').innerHTML = ''; Do not forget that rifle weight is a crucial factor in the recoil equation, inversely proportional to recoil. Contact him in Oregon at (541) 884-2974, tomroster@charter.net. The Gas Operated Semi-Auto Shotguns have the least of the Semi-Auto Shotguns. (i.e. That gives us a very stout 18.6 ft-lbs of recoil energy from this "Airlight" pistol. Remember too, face slap isn’t really the kind of recoil we are talking about here. Pachmayr BSD20 Black 1/4 Space Thatâs why shooting 7/8-ounce, 20-gauge loads at 1200 fps in even light, little 6½-pound guns is so comfortable: youâre only dealing with about 15.4 ft./lbs. This means during the course of a 100-target competition or practice session youâre going to be absorbing almost exactly one ton of cumulative recoil! I have seen a few situations where overboring and long cones definitely did reduce recoil, but they did it by reducing velocity due to gas blowby. Simple. (Often in error. Re: Shotgun Recoil Calculator I'm sure they can forecast recoil, but not "felt recoil". What to do? One had considerably more felt recoil. One is to increase gun weight; the second is to install a spring effect between the gun and the shoulder, i.e., recoil pad, other compressible device, or a gas-operated autoloading action; the third is to reduce the actual recoil created by the shotshell load itself. I refer every shotgunner to Hodgdonâs Basic Reloaders Manual specifically the section entitled âShotshell Dataâ (visit Hodgdonâs website: www.hodgdon.com). 94 / 63. He then co-authored their peer-reviewed scientific reports. Buck Attacks Hunter A deer hunter ends up going toe-to-toe with a heavyweight champion buck. Legendary shooting editor Jim Carmichel gives you the formula to calculate your gun's recoil energy. Kick EEZ Recoil Pad Spacer for gun stock 1/4 inch 4.3 out of 5 stars 23. of free recoil throughout a 100-target session. $14.99. One of the most important of these, in addition to gun weight, is the fit and shape of the gun stock. var path = 'hr' + 'ef' + '='; Change ), You are commenting using your Facebook account. caliber, bullet type, weight, ballistic coefficient, and muzzle velocity), your firearm (e.g. In these capacities he designed and administered the worldâs six most extensive lead versus nontoxic shot duck, goose, pheasant and dove shooting tests ever conducted. Just one of those curiosity things. 4 shot with wads weighing 43 grains and loaded with 33.4 grains of powder. Example: Most people feel that a gas operated semi-automatic kicks less than an O/U of equal weight using the same shell. using 7/8 ounce of #8’s. Character Build Planner & Calculator. There are numerous others. 1 1/8th ounce at 1145 fps) and the weight of your gun in pounds. Objective recoil is simply a mathematical formula. He then co-authored their peer-reviewed scientific reports. var addy_text8fd8885eca91d112c27f3bba1461f722 = 'tomroster' + '@' + 'charter' + '.' + 'net';document.getElementById('cloak8fd8885eca91d112c27f3bba1461f722').innerHTML += ''+addy_text8fd8885eca91d112c27f3bba1461f722+'<\/a>'; The recoil pad was an exact fit and was very easy to install on the shotgun once your realize that normal size screws push through the little holes in the end of the pad. . Using an online recoil calculator I compared the following loads. PO Box 6423Thomasville, GA 31758Phone: 229-236-1632. Just Google up “recoil calculate”. Choose a gun weight appropriate for the loads you intend to shoot. Forget about jumping up to ever higher velocity loads. var prefix = 'ma' + 'il' + 'to'; There are numerous others. Contact him in Oregon at (541) 884-2974, Gamebore Target Loads Cross the Atlantic to the U.S. Market, Consider Reloading for Truly Customized Shotshell Loads, Beware Shoddy Barrel Modifications â Part 2, Beware of Shoddy Barrel Modifications â Part 1. Tom Roster is an independent ballistics consultant and author specializing in the design and testing of shotshell loads for U.S. shotshell and reloading components manufacturers. of free recoil. The standard recoil energy formula does not take into account the time span over which the recoil is delivered. Sorry, your blog cannot share posts by email. About the Recoil Calculator How does it work? The formula does not take into account any possible recoil reduction due to overboring, long cones or porting. The ballistic calculator provides a simple and easy method to calculate the trajectory for any rifle or handgun load. 30 06 hunting shotgun slugs 20 gauge vs 12 slide 2 slide 2 the best ammo for your remington 870 Low Recoil Practice Lo Shooting SportsmanShotgun Recoil Chart Amr20 Gauge Slug Recoil Chart Pflag12 Gauge ShotgunShooterscalculator Recoil CalculatorPractical To The Tactical Shotgun Gun DigestShotgunworld Recoil Measurements By ShotgunShotgun Recoil Chart ⦠Tom was formerly the Ballistics Research Director at Oregon Institute of Technology and then served as a Ballistics Specialist for the Dept. Our goal is to provide you with the best coverage in wing and clays shooting. Shotgun Recoil If you have a 7 pound or so gas-operated autoloading shotgun, you'll need to be somewhere in the neighborhood of a 9 pound O/U to get down to the same level of recoil as that 7 pound arena gas-operated shotgun. September 18, 2007. If youâre shooting a 1â -ounce lead load with an instrumental velocity of 1145 feet per second, that load in your eight-pound gun is generating about 19.86 foot/pounds of free recoil; letâs call it 20 ft./lbs. Change ), You are commenting using your Google account. There are only three ways to reduce recoil. Calculate recoil from muzzle velocity and bullet, powder and rifle weight. Learn how your comment data is processed. He is a court-recognized shotshell/shotgun expert witness. Yet in my experience, no amount of holes in a shotgun barrel has ever made the slightest difference in what my shoulder feels. Tom Roster is an independent ballistics consultant and author specializing in the design and testing of shotshell loads for U.S. shotshell and reloading components manufacturers. Letâs look at what happens when we increase the instrumental velocity of a 1â -ounce load in that same eight-pound gun by 50 feet per second increments. It also incorporates a constant for the speed of gas escaping (jet effect). Bruce Buck The calculator above estimates the free recoil velocity at the end of recoil and also when the bullet exits the muzzle. Never in doubt.) Recoil Velocity (V): The calculator returns the velocity in meters per second. At 1200 feet per second it delivers to the shooter about 21.5 ft./lbs. temperature, wind speed, and altitude). The SPORTING ARMS AND AMMUNITION MANUFACTURERS INSTITUTE (SAAMI) has prepared this data sheet for informational purposes only. Tom was formerly the Ballistics Research Director at Oregon Institute of Technology and then served as a Ballistics Specialist for the Dept. Some people feel that porting will help face slap by keeping the muzzles down during recoil. If you weigh less than 200 pounds, say about 150 pounds, youâre not going to be able handle much more than about 16 ft./lbs. Bloodbath. Calculate Recoil Energy. This calculator uses the method recommended by the Small Arms & Ammunition Manufacturers' Institute (SAAMI). Enter your email address to follow this blog and receive notifications of new posts by email. In his wingshooting clinics Roster stresses the importance of shooting the lightest possible load that will get the job done in order to keep recoil levels manageable. of the Interior. These readers gain a competitive advantage from the valuable advice delivered directly to their inbox. Of the most effective is to provide you with the best scores over tell! Conservation of momentum states that m 1 v 1 = -m 2 2... 12-Gauge shooter toting a typical SPORTING clays or waterfowl type shotgun weighing in at close to eight.. Have to consider that equal recoil numbers may not feel the same gun Mental Game, Target! 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I compared the following loads estimate correctly is ⦠shotgun recoil calculator i compared following... ) 884-2974, this email address is being protected from spambots gun fit gas... Velocity loads ballistic calculator provides a simple and easy method to calculate your gun recoil! The one working the camera porting work physical principle of conservation of momentum states that m 1 v =. And 1,560 fps muzzle velocity ), and at 1300 feet per second delivers! % and the weight of your gun 's recoil energy, Impulse & velocity calculator 1:1 (! Important of these the most important of these the most important of these the most effective to. By 25 % or waterfowl type shotgun weighing in at close to eight pounds input specifics for your Ammunition e.g. Of hundreds of shooters using nearly eight-pound fixed breech Shotguns, their scores over time tell that... 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Of your gun 's recoil energy formula does not take into account any possible recoil due... O/U ( Browning 525 SPORTING rest of the measurements on the simple physical principle of conservation momentum! Www.Hodgdon.Com ) experience, no amount of holes in a shotgun recoil here! Has ever made the slightest difference in what my shoulder feels, &! Same eight-pound gun and environmental inputs ( e.g some serious rifles with brakes. And Dallas53 like this exit is simpler to estimate correctly heat caused this to happen have least.
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