Some cartridges do not have either a PSI or CUP listed, and these values are omitted. Chambered for 44 Magnum … He said they have extensively tested it and determined it to be strong enough to withstand the pressures given by standard .44 Magnum factory ammunition. Yes, a Ruger that has been factory chambered for 44 Magnum can be shot all day long with SAAMI spec 44 Magnum loads with no ill effects. But as for asking it to contain pressure far beyond that, NO THANKS! The .44 Magnum is one hard-hitting round, but there’s a time when serious handgun hunters turn toward more powerful calibers. Barrel Liner Specifications. What are the pressure signs to look for when loading widely accepted, yet highly suspected, high pressure .45-70 loads in the 1895 Marlin ? It is a tribute to the quality of modern .45 Colt brass that it has proven safe (in Blackhawk and Contender guns only) with maximum pressures about 57% greater than the SAAMI limit. At the time, SAAMI used a non-linear unit of measurement known as a “copper unit of pressure” (c.u.p.) Both are within book values but compressed to around 105-110% load density. All Taurus revolvers can shoot +p except the M856, but is .44 magnum SAAMI recognized? Depending on the method of pressure testing the manufacturer uses. Condition: New product. The SAAMI Maximum Average Pressure (MAP) is listed in both the Copper Units of Pressure (CUP) and the Pounds per Square Inch (PSI). Such pressures may affect the useful life of the firearm or exceed the margin of safety built into many revolvers and could therefore be DANGEROUS. The trim to length is equivalent to the minimum case length. Also excessive pressure can be caused by brass being to long. Because there are modern firearms that can safely shoot more powerful ammunition than the SAAMI limits, the firearm/ammunition industry has recognized three levels of ammunition for the 45-70. Matching Maximum Pressure: 56000 psi, or 386 Mpa These calculations refer to your specified settings in … The trim to length is equivalent to the minimum case length. The classic “Skeeter Load” is a 240-250 grain LSWC with 7.5 grains of Unique in a 44 Special casing. The SAAMI pressure limit for the 44 Special is 15,500 psi. COAL stands for … Compared with .22 Magnum, with its higher case capacity, peak pressure would probably mirror that of the CCI hot loads, up near the SAAMI … Recently the .44 Special … Today’s SAAMI pressure limits for the .44-40 and many other vintage blackpowder rounds are typically specified in copper units of pressure (CUP). The 44 Mag in its SAAMI restricted pressure range is a different beast and it is a good and proven killer but with the above mentioned loads it is leaving quite a bit of killing potential on the table. SAAMI, QuickLoad, lever action rifles and other curiosities…. Company president Anthony Imperato states that the Big Boy can handle any loadings within the SAAMI pressure limit (36,000 PSI for the .44 Magnum). That load will usually exceed the SAAMI pressure … Max chamber pressures are set at relatively lower levels corresponding to the reduced strength capabilities of firearms that are more than a century old. The SAAMI maximum pressure standard for the 44 SW special is 15,500 PSI. Founded in 1926, SAAMI … A. Smith. Jaywalker Member. I thought I would attempt … (SAAMI) Bullet: .308, 180, Flatline - F T/R Useable Case Capaci: 81.648 grain H2O = 5.301 cm³ Cartridge O.A.L. The way the cases looked in the cylinder seems to indicate that the problem might be in only one or two chambers. piezo crusher SAAMI CIP SAAMI CIP other .17 Hornet 50 .17 Mach 4 60* 52 .17 Fireb 55 .17 Rem 63 62 52 53 .204 Ruger 58 59 .22 Short 21 .22 Long 24 .22 LR 24 .22 WMRF 24 5.6x35R 39 35 .22 Hornet 49 44 43 41? Joined: May 28, 2003 Messages: … 20 thoughts on “Unsolved: 44 Magnum Over-Pressure Mystery” Keith Yates says: June 13, 2019 at 6:03 pm One thing I didnt hear you mention was how heavy of a roll crimp was used. I've read that SAAMI lowered the maximum chamber pressure for .357 Mag because manufacturers were putting out smaller .357s - even with new materials like scandium and titanium, a J-frame probably isn't as strong as a steel N-frame. SAAMI (Small Arms and Ammunition Manufacturers Institute) The organization that establishes firearm standards in the United States. In .44 Mag, that means any load over about 1250 ft-lbs of energy, or anything in the +P or +P+ category. It should be since the .44 Magnum operates at about 2.5 times the maximum SAAMI pressure of the .45 Colt. Some cartridges do not have either a PSI or CUP listed, and they are omitted. CARTRIDGE: .300 Win. (Now chambered full SAAMI Specifications) Rifle dimensions for our 44 Magnum Barrel Liners … I suspect it had more to do with more accurate pressure measurement methods when electronic transducers took over from copper cylinders getting hammered shorter. Perhaps the hotter CCI's take the pressures up into the SAAMI max range in order to achieve their higher velocities. Most pressure curves I've seen for black powder show peak pressure in about 90 - 125 microseconds, vs. smokeless in 150 - 250 microseconds. those proved to 960 bar (transducer) or, previously, 850 bar (crusher)), or magnum proof shotguns (i.e. My only compressed loads at present are a 44 Rem Mag Marlin 1894 loading with H110 and a 375H&H load with N150. (now … DOWNLOAD SAAMI Rimfire Cartridge/Chamber Drawings >> SAAMI, the Sporting Arms and Ammunition Manufacturers’ Institute, is an association of the nation’s leading manufacturers of firearms, ammunition and components. Bullet Pull and Heavy 44 Loads; 44Mag and/or 45 Colt, Which way to go? Link to post Share on other sites. I've also tested lightly compressed loads in .270win (RL22) and 6.5CM (various powders). Cartridges with +P Pressures, list both the standard and +P Pressure. Standard pressure .38 Special was capped at around 18,900 c.u.p. I'd like to use the Deerslayer this fall for whitetail. I can see where you could get near the velocities of Buffalo Bore using the higher end of SAAMI 38 Spl +P specs (MPSM), perhaps with 2400 and 158 gr swc. In recent years the .44 Magnum… Threaded 5/8-24 NF on Chamber and Muzzle. More details . Just can't seem to find reloading info for the carbine, but plenty for handguns. If you can take it, the gun can take it. All weapons manufactures adhere to the same standards. So most manufacturers have downloaded some of their ammo, and you'll find that a lot of today's published reloading data is … 3 Posts . As for compressed loads, I haven't seen issues. Outside Diameter Details .640″ Chambered for 44 Magnum. And they found out what the pressure really was. Depending on how it's loaded, the .44 Magnum delivers between 900 and 1,500 foot pounds of energy; by contrast, the .45 ACP's power ranges between 400 and 600 foot pounds. All the top-end reloading data with pressure-tested data shows .44 Magnum loads maxing out at 35,000 psi (or 38,000 CUP). That is what it was designed for. This is a CYA response as +P (plus pressure) would by definition exceed SAAMI MAXIMUM average pressure of 28,000 CUP. When he talks, people … At The Range. Rifled and also Chambered for 44 Magnum All the liners / blanks we sell have been tested and can withstand the pressure of the round they are chambered for standalone. That is why in .45 LC AND in .44 Mag there are RUGER REDHAWK/DAN WESSON/CUSTOM ONLY loads that cannot be safely shot in any S&W, Taurus, or Colt. We are often asked how performance/pressure parameters were established for our 45-70 Hammerhead Ammo. .44 Magnum & .357 Magnum were both reduced at the same time. (1903-1938,) - 22,000 CUP (Exceeds SAAMI MAP) 44 Magnum - 22,100 up to 40,000 CUP PART 2, https://youtu.be/IKudU8QPdco 44 Mag; 45 Colt ; 454 Casull ; 45-70; 540 BFR ONLY ; Terms & Conditions; Contact Page; Garrett's Commentaries. Ruger would discourage any one from exceeding 36,000 psi. On a final note, all my … (now, 17,000 p.s.i.) The .44 Magnum has earned a reputation as one of the most powerful handgun rounds available for home defense or hunting. to evaluate internal case pressures (now superseded by the more precise pounds per square inch, or p.s.i.). While most pistol cartridges will … These cartridges, if they are to be fired from standard proof shotguns (i.e. Cartridges with +P Pressures, list both the standard and +P Pressure. and the higher pressure .38 Special +P was capped at about 22,200 c.u.p. Driftwood Johnson, SASS #38283. J. It's capable of taking down extremely large game. Barrel Liner Specifications . .218 Bee 46 40 41 .22 Rem Jet 37 40 .221 Rem 46 52 5.6x50R 49 44 .222 50 54 46 46 .222 Mag. The document even includes info on pressure terminology, headspace gauges, and test barrels. The .44 Magnum is a serious handgun round and the second revolver cartridge to bear the name “Magnum” on its head stamp. (Refer to Hodgdon’s load data.) For the person who reloads and is willing to slightly exceed the SAAMI limits, the 44 Special is capable of both excellent accuracy and excellent terminal performance. Firearms chambered for the 44 Mag must be able to stand the SAAMI Specifications that are established for that cartridge which is 36,000 PSI or 40,000 CUP's. The SAAMI Maximum Average Pressure (MAP) is listed in both the Copper Units of Pressure (CUP) and the Pounds per Square Inch (PSI). Outside Diameter Details .645″ for 20 & 28″.620″ for 11″ and Shorter Liners. If you’re a glutton for shooting expensive ammo, Buffalo Bore makes Big Boy-safe .44 Magnums that deliver nearly 2,000 lb-ft of muzzle energy. I'm trying to find reloading data for the 300 gr Hornady XTP. These … those proved to 1370 bar (transducer) or, previously, 1200 bar (crusher)) must not exceed the maximum admissible service pressure of 74 MPa (new units megapascals, in place of the old 740 bar) … When do I anticipate developing some class ? Regarding the .44-40, today’s reloading manuals usually list recipes … 2. The industry Maximum average pressure for the 44 Magnum is 36,000 psi. As a result, gunmakers offered fewer revolver models chambered in .44 Special for several years. rc rcmodel, Dec 24, 2012 #11. Mag. Some … Max loads for .44 Magnum that RRH's and DW's can shoot are in the 1550 ft-lbs energy range. 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