{"id":2665,"date":"2021-10-20T11:49:45","date_gmt":"2021-10-20T11:49:45","guid":{"rendered":"https:\/\/www.ammoforsale.com\/ammo-club\/?p=2665"},"modified":"2021-10-04T11:51:24","modified_gmt":"2021-10-04T11:51:24","slug":"7-62x39-vs-5-56","status":"publish","type":"post","link":"https:\/\/www.ammoforsale.com\/ammo-club\/7-62x39-vs-5-56\/","title":{"rendered":"7.62×39 vs 5.56"},"content":{"rendered":"

No two rifle cartridges demand comparison more than 7.62×39 vs 5.56. One is America\u2019s favorite rifle cartridge; the other is Russia\u2019s pride and joy, but hugely popular stateside nonetheless.<\/p>\n

Ammo doesn\u2019t have politics and nationalities. We judge a round solely on the quality of its in-flight ballistics, energy, recoil, and price and availability. That\u2019s why we\u2019re going to compare those qualities in order to settle the 5.56×45 vs 7.62×39 debate \u2013 if it can be settled at all.<\/p>\n

Most articles like these begin with long-winded histories of the two rounds they\u2019re comparing. We know there are a thousand other places where you can read up on Remington or the Technical Council of the People’s Commissariat for Armaments, so we\u2019re going to spare you a lecture. Let\u2019s jump right into things by taking a look at these two cartridges\u2019 dimensions side by side.<\/p>\n

Cartridge Dimensions<\/em><\/h3>\n

\"7.62x39<\/p>\n\n\n\n\n\t\n\n\t\n\t\n\t\n\t\n\t\n\t\n\t\n\t\n\t\n\t\n\t
<\/td>5.56x45<\/th>7.62x39<\/th>\n<\/tr>\n<\/thead>\n
Case type<\/td>Rimless, bottleneck<\/td>Rimless, bottleneck<\/td>\n<\/tr>\n
Bullet diameter<\/td>0.224 in<\/td>0.309-0.311 in<\/td>\n<\/tr>\n
Neck diameter<\/td>0.253 in<\/td>0.339 in<\/td>\n<\/tr>\n
Shoulder diameter<\/td>0.354 in<\/td>0.396 in<\/td>\n<\/tr>\n
Base diameter<\/td>0.377 in<\/td>0.447 in<\/td>\n<\/tr>\n
Rim diameter<\/td>0.378 in<\/td>0.447 in<\/td>\n<\/tr>\n
Rim thickness<\/td>0.045 in<\/td>0.059 in<\/td>\n<\/tr>\n
Case length<\/td>1.760 in<\/td>1.524 in<\/td>\n<\/tr>\n
Overall length<\/td>2.260 in<\/td>2.205 in<\/td>\n<\/tr>\n
Case capacity<\/td>28.5 gr H2O<\/td>35.6 gr H2O<\/td>\n<\/tr>\n
Maximum pressure<\/td>62,366 psi<\/td>45,010 psi<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n\n

The obvious difference between the 5.56 and the 7.62 is their bullet diameters. The former is a .22 caliber round, while the latter is a .30 cal. This has big implications for their bullet weights. The 5.56 typically has a 55 grain bullet, although bullets weighing 40, 62, and 77 grains are not uncommon. Its greater diameter means the 7.62 bullet can weigh substantially more \u2013 usually 123 grains or very close to it.<\/p>\n

Next consider the two rounds\u2019 case capacities \u2013 not terribly different from one another, so they can store similar propellant charges. And considering that the 5.56 is loaded to a higher pressure, it only follows that its lighter bullet should deliver a greater muzzle velocity. That\u2019s just physics, folks.<\/p>\n

Ballistics Comparison<\/em><\/h2>\n

7.62×39 vs 5.56: Muzzle Velocity<\/h3>\n

\"Shooting<\/p>\n\n\n\n\n\t\n\n\t\n\t\n\t\n\t\n\t\n\t\n\t\n\t\n\t\n\t\n\t\n\t\n\t\n\t\n\t\n\t\n\t\n\t\n\t\n\t\n\t\n\t\n\t
<\/td>5.56 - Federal American Eagle 55gr FMJBT<\/strong><\/th>7.62x39 Federal American Eagle 124gr FMJ<\/strong><\/th>\n<\/tr>\n<\/thead>\n
Muzzle velocity (fps)<\/td>3165<\/td>2350<\/td>\n<\/tr>\n
Velocity @ 50 yds<\/td>2966<\/td>2213<\/td>\n<\/tr>\n
Velocity @ 100 yds<\/td>2777<\/td>2081<\/td>\n<\/tr>\n
Velocity @ 150 yds<\/td>2596<\/td>1953<\/td>\n<\/tr>\n
Velocity @ 200 yds<\/td>2421<\/td>1831<\/td>\n<\/tr>\n
Velocity @ 250 yds<\/td>2253<\/td>1714<\/td>\n<\/tr>\n
Velocity @ 300 yds<\/td>2092<\/td>1603<\/td>\n<\/tr>\n
Velocity @ 350 yds<\/td>1938<\/td>1499<\/td>\n<\/tr>\n
Velocity @ 400 yds<\/td>1791<\/td>1402<\/td>\n<\/tr>\n
Velocity @ 450 yds<\/td>1653<\/td>1312<\/td>\n<\/tr>\n
Velocity @ 500 yds<\/td>1523<\/td>1233<\/td>\n<\/tr>\n
<\/td>5.56 - Sellier & Bellot 55gr FMJBT<\/strong><\/td>7.62x39 Sellier & Bellot 124gr FMJ<\/strong><\/td>\n<\/tr>\n
Muzzle velocity (fps)<\/td>3301<\/td>2421<\/td>\n<\/tr>\n
Velocity @ 50 yds<\/td>3103<\/td>2274<\/td>\n<\/tr>\n
Velocity @ 100 yds<\/td>2914<\/td>2132<\/td>\n<\/tr>\n
Velocity @ 150 yds<\/td>2733<\/td>1995<\/td>\n<\/tr>\n
Velocity @ 200 yds<\/td>2560<\/td>1864<\/td>\n<\/tr>\n
Velocity @ 250 yds<\/td>2393<\/td>1738<\/td>\n<\/tr>\n
Velocity @ 300 yds<\/td>2232<\/td>1619<\/td>\n<\/tr>\n
Velocity @ 350 yds<\/td>2077<\/td>1508<\/td>\n<\/tr>\n
Velocity @ 400 yds<\/td>1929<\/td>1404<\/td>\n<\/tr>\n
Velocity @ 450 yds<\/td>1787<\/td>1310<\/td>\n<\/tr>\n
Velocity @ 500 yds<\/td>1653<\/td>1227<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n\n

The 5.56 is a speed demon, often loaded to muzzle velocities in excess of 3,200 fps. The 7.62 is no slouch in terms of velocity either, although its bullet typically exits the muzzle at a rate 20 to 25 percent slower than the 5.56.<\/p>\n

The 7.62 rounds we compared all have higher ballistic coefficients than the 5.56 ones, meaning they are able to retain relatively more of their initial velocity as they hurtle downrange. But that\u2019s just not enough to make the 7.62\u2019s trajectory nearly as flat as the 5.56. The 5.56\u2019s lighter, faster bullet gives gravity far less time to pull it down to earth, so it\u2019s bound to evince less drop than its competition.<\/p>\n

Trajectory<\/h3>\n\n\n\n\n\t\n\n\t\n\t\n\t\n\t\n\t\n\t\n\t\n\t\n\t\n\t\n\t\n\t\n\t\n\t\n\t\n\t\n\t\n\t\n\t\n\t\n\t\n\t\n\t\n\t\n\t
<\/td>5.56x45 Federal American Eagle 55gr FMJBT<\/th>7.62x39 Federal American Eagle 124gr FMJ<\/th>\n<\/tr>\n<\/thead>\n
G1 ballistic coefficient<\/td>0.25<\/td>0.303<\/td>\n<\/tr>\n
G7 ballistic coefficient<\/td>0.126<\/td>0.163<\/td>\n<\/tr>\n
Elevation @ 50 yds<\/td>0.04<\/td>0.86<\/td>\n<\/tr>\n
Elevation @ 100 yds<\/td>0.58<\/td>1.44<\/td>\n<\/tr>\n
Elevation @ 150 yds<\/td>0<\/td>0<\/td>\n<\/tr>\n
Elevation @ 200 yds<\/td>-1.88<\/td>-3.71<\/td>\n<\/tr>\n
Elevation @ 250 yds<\/td>-5.24<\/td>-10.03<\/td>\n<\/tr>\n
Elevation @ 300 yds<\/td>-10.32<\/td>-19.3<\/td>\n<\/tr>\n
Elevation @ 350 yds<\/td>-17.39<\/td>-31.96<\/td>\n<\/tr>\n
Elevation @ 400 yds<\/td>-26.78<\/td>-48.5<\/td>\n<\/tr>\n
Elevation @ 450 yds<\/td>-38.88<\/td>-69.47<\/td>\n<\/tr>\n
Elevation @ 500 yds<\/td>-54.17<\/td>-95.48<\/td>\n<\/tr>\n
<\/td>5.56x45 Sellier & Bellot 55gr FMJBT<\/strong><\/td>7.62x39 Sellier & Bellot 124gr FMJ<\/strong><\/td>\n<\/tr>\n
G1 ballistic coefficient<\/td>0.259<\/td>0.286<\/td>\n<\/tr>\n
G7 ballistic coefficient<\/td>0.127<\/td>0.143<\/td>\n<\/tr>\n
Elevation @ 50 yds<\/td>-0.05<\/td>0.77<\/td>\n<\/tr>\n
Elevation @ 100 yds<\/td>0.49<\/td>1.34<\/td>\n<\/tr>\n
Elevation @ 150 yds<\/td>0<\/td>0<\/td>\n<\/tr>\n
Elevation @ 200 yds<\/td>-1.65<\/td>-3.53<\/td>\n<\/tr>\n
Elevation @ 250 yds<\/td>-4.63<\/td>-9.57<\/td>\n<\/tr>\n
Elevation @ 300 yds<\/td>-9.13<\/td>-18.49<\/td>\n<\/tr>\n
Elevation @ 350 yds<\/td>-15.38<\/td>-30.73<\/td>\n<\/tr>\n
Elevation @ 400 yds<\/td>-23.65<\/td>-46.8<\/td>\n<\/tr>\n
Elevation @ 450 yds<\/td>-34.26<\/td>-67.28<\/td>\n<\/tr>\n
Elevation @ 500 yds<\/td>-47.59<\/td>-92.82<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n\n

The 5.56\u2019s flatter trajectory makes it easier to aim over longer ranges. You\u2019re certain to have better success with the 5.56 for long-distance shooting, especially given the 7.62\u2019s tendency to begin dropping off steeply past the 200 yard mark. But both the 5.56 and 7.62 are plenty accurate at ranges within 100 yards, a distance which most shooters would stay within at the rifle range anyway. Neither one is a sniper round!<\/p>\n

Energy<\/h3>\n\n\n\n\n\t\n\n\t\n\t\n\t\n\t\n\t\n\t\n\t\n\t\n\t\n\t\n\t\n\t\n\t\n\t\n\t\n\t\n\t\n\t\n\t\n\t\n\t\n\t\n\t
<\/td>5.56x45 Federal American Eagle 55gr FMJBT<\/th>7.62x39 Federal American Eagle 124gr FMJ<\/th>\n<\/tr>\n<\/thead>\n
Muzzle energy (ft lbs)<\/td>1224<\/td>1521<\/td>\n<\/tr>\n
Energy @ 50 yds<\/td>1075<\/td>1349<\/td>\n<\/tr>\n
Energy @ 100 yds<\/td>942<\/td>1192<\/td>\n<\/tr>\n
Energy @ 150 yds<\/td>823<\/td>1051<\/td>\n<\/tr>\n
Energy @ 200 yds<\/td>716<\/td>923<\/td>\n<\/tr>\n
Energy @ 250 yds<\/td>620<\/td>809<\/td>\n<\/tr>\n
Energy @ 300 yds<\/td>535<\/td>708<\/td>\n<\/tr>\n
Energy @ 350 yds<\/td>459<\/td>619<\/td>\n<\/tr>\n
Energy @ 400 yds<\/td>392<\/td>541<\/td>\n<\/tr>\n
Energy @ 450 yds<\/td>334<\/td>474<\/td>\n<\/tr>\n
Energy @ 500 yds<\/td>283<\/td>419<\/td>\n<\/tr>\n
<\/td>5.56x45 Sellier & Bellot 55gr FMJBT<\/td>7.62x39 Sellier & Bellot 124gr FMJ<\/td>\n<\/tr>\n
Muzzle energy (ft lbs)<\/td>1331<\/td>1614<\/td>\n<\/tr>\n
Energy @ 50 yds<\/td>1176<\/td>1423<\/td>\n<\/tr>\n
Energy @ 100 yds<\/td>1037<\/td>1251<\/td>\n<\/tr>\n
Energy @ 150 yds<\/td>913<\/td>1096<\/td>\n<\/tr>\n
Energy @ 200 yds<\/td>800<\/td>956<\/td>\n<\/tr>\n
Energy @ 250 yds<\/td>699<\/td>832<\/td>\n<\/tr>\n
Energy @ 300 yds<\/td>608<\/td>722<\/td>\n<\/tr>\n
Energy @ 350 yds<\/td>527<\/td>626<\/td>\n<\/tr>\n
Energy @ 400 yds<\/td>454<\/td>543<\/td>\n<\/tr>\n
Energy @ 450 yds<\/td>390<\/td>473<\/td>\n<\/tr>\n
Energy @ 500 yds<\/td>334<\/td>414<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n\n

The 5.56 may have its competition beat in terms of muzzle velocity, yet the 7.62\u2019s bullet compensates for that by weighing about 2 to 2.5 times more. This means it boasts superior energy at all ranges.<\/p>\n

Selecting a round for self-defense? Then you don\u2019t really have to worry about which one is more powerful. Either the 7.62 or 5.56 will overwhelm a human-sized target at close range, so the 7.62\u2019s 20 to 25 percent greater muzzle energy doesn\u2019t necessarily mean it will more effectively neutralize a threat. Its wider bullet will carve out a bigger wound channel, however, so its terminal effect does tend to prove a bit more harmful. Icing on the cake, so to speak.<\/p>\n

For deer hunting the more powerful 7.62 tops the 5.56. The consensus is that 1,000 ft lbs is the minimum required energy for ethical deer hunting. A 5.56 often fails to transfer that much energy at 100 yards, while the 7.62 can easily extend a hunter\u2019s reach past 150 yards. But it\u2019s important to keep in mind that both rounds were developed for shooting enemies of their respective states of origin, not hunting.<\/p>\n

Recoil\u00a0of 7.62×39 vs 5.56<\/h3>\n

\"Shooting<\/p>\n

Recoil is important, friends. We admit it\u2019s thrilling to fire a weapon that kicks like a mule on bath salts, but you wouldn\u2019t want to put up with that kind of abuse all day long. What\u2019s more, heavy recoil complicates self-defense. The more recoil a rifle generates, the more each shot will throw off your carefully lined up aim.<\/p>\n

At the end of the day, the amount of recoil you actually perceive is subjective. We can\u2019t quantify what you actually feel. What we can do is objectively measure a cartridge\u2019s recoil energy by considering four factors: bullet weight, propellant weight, muzzle velocity and rifle weight.<\/p>\n

Let\u2019s do a real apples-to-apples comparison of the above rounds\u2019 recoil energy. For the sake of this exercise lets assume all six rounds have 24 grains of propellant. We\u2019re firing the 5.56 in a 7.75 lb Windham Weaponry Dissipator Hvy. Bbl and the 7.62 in a 7.7 lb AK-47.<\/p>\n\n\n\n\n\t\n\n\t\n\t\n\t\n\t\n\t\n\t
<\/td>Recoil Energy (ft lbs)<\/th>\n<\/tr>\n<\/thead>\n
5.56x45 Federal American Eagle 55gr FMJBT<\/td>3.54<\/td>\n<\/tr>\n
5.56x45 Sellier & Bellot 55gr FMJBT<\/td>3.72<\/td>\n<\/tr>\n
5.56x45 Nosler SSA 55gr Ballistic Tip<\/td>2.95<\/td>\n<\/tr>\n
7.62x39 Federal American Eagle 124gr FMJ<\/td>6.97<\/td>\n<\/tr>\n
7.62x39 Sellier & Bellot 124gr FMJ<\/td>7.27<\/td>\n<\/tr>\n
7.62x39 Nosler 123gr Ballistic Tip<\/td>6.97<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n\n

The 7.62 might have about 75 percent of the 5.56\u2019s muzzle velocity, but its far heavier bullet makes it deliver about twice as much recoil. It\u2019s important to consider that we picked a relatively heavy AR for the purpose of this comparison. Heavier gun equals less recoil, so if we fired the Federal round in a 6.5 lb Ruger AR-556 its recoil energy would be higher at 4.22 ft lbs \u2013 but that\u2019s still <\/em>less kick than the AK.<\/p>\n

To be certain, neither round produces an inconvenient amount of recoil. A normal sized shooter could fire an AK all day long and never get tired of it \u2013 and many do. But if you demand lower recoil for your own comfort or to make it easier to direct rapid, accurate fire at a threat, then you\u2019d want the 5.56.<\/p>\n

Availability & Price<\/em><\/h3>\n

Assuming the ammo market hasn\u2019t gone bazooey in reaction to some impending apocalypse, finding either 7.62×39 ammo<\/a> or 5.56 is easy as pie. Put on a blindfold, walk into a gun store, and you\u2019re sure to find both types of ammo. (The store clerks will probably think you\u2019re weird if you do that, so put on a blindfold and shop for ammo on our site instead. Be sure to have an explanation ready for your wife when you wind up blindly ordering 38 cases of blank 22 Short ammo.)<\/p>\n

The two rounds also cost about the same. But here\u2019s the thing: While AR owners often note extraction issues when they fire steel-cased 5.56, the AK\u2019s forgiving tolerances enable it to run steel-cased 7.62 with practically zero issues. In a nutshell, by preferring 7.62 you get to take full advantage of all that budget-friendly steel-cased Russian ammo, while it is available. It\u2019s not reloadable, it shoots a little dirtier, and its bullets are magnetic, but hey \u2013 you can save a lot of dough with an AK!<\/p>\n

The Takeaway: 7.62×39 vs 5.56<\/em><\/h3>\n

The 5.56 offers slightly superior accuracy and lighter recoil. The 7.62 delivers greater energy on impact as well as the opportunity to take better advantage of the cost saving power of steel. It\u2019s a close race, but we\u2019ve overlooked the deciding factor in the 5.56×45 vs. 7.62×39 debate: the rifles.<\/p>\n

There are several rifles available chambered for 5.56 ammo<\/a>, and they will all let you fire nearly identical 223 Rem ammo as well. The most popular of these rifles really nearly begs no mention. When you embrace the 5.56 you get to have fun with the AR-15. It\u2019s endlessly customizable, as cheap or expensive as you want it to be, and extremely reliable. Americans haven\u2019t chosen so practical a rifle as their very favorite because they don\u2019t understand guns.<\/p>\n

By comparison the AK-47 isn\u2019t remotely customizable. You can affix a bayonet to it or even give it a rather awkward scope mount if you feel like Mikhail Kalashnikov left something out, but other than that an AK is meant to stay the way it is. Alternatively you could get an SKS instead, but that\u2019s by no means a gun modder\u2019s dream rifle either.<\/p>\n

Yet the AK has its blessings. You can get a real workhorse for about $500, and you can abuse the absolute heck out of it before it thinks about jamming up on you. And this may sound biased, but the AK is a very handsome rifle. There\u2019s a certain charm to walnut that polymer will never match.<\/p>\n

If you\u2019re on the fence, try out an AR-15 and then an AK-47. See which one you like more, and then decide whether you prefer the 5.56 or 7.62 based solely on that.<\/p>\n

Don\u2019t like either rifle? Consider learning kung fu.<\/p>\n","protected":false},"excerpt":{"rendered":"

No two rifle cartridges demand comparison more than 7.62×39 vs 5.56. 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