And they found out what the pressure really was. The hype and excitement surrounding the introduction of the .44 Magnum in the mid-1950s eclipsed the .44 Special, causing the latter to fall out of popularity with firearms manufacturers. Thanx. Standard pressure .38 Special was capped at around 18,900 c.u.p. The classic “Skeeter Load” is a 240-250 grain LSWC with 7.5 grains of Unique in a 44 Special casing. 41 37 .225 Win. At the time, SAAMI used a non-linear unit of measurement known as a “copper unit of pressure” (c.u.p.) We are often asked how performance/pressure parameters were established for our 45-70 Hammerhead Ammo. Both are within book values but compressed to around 105-110% load density. (now … Perhaps it … Ruger would discourage any one from exceeding 36,000 psi. The .44 Magnum has earned a reputation as one of the most powerful handgun rounds available for home defense or hunting. Please Select Reamer Type: Reamers are available in Carbide for production run needs: Please contact a sales associate if you have any questions or if you would like to order a carbide reamer. The .44 Magnum is one hard-hitting round, but there’s a time when serious handgun hunters turn toward more powerful calibers. All Taurus revolvers can shoot +p except the M856, but is .44 magnum SAAMI recognized? Driftwood Johnson, SASS #38283 1,042 Posted June 21, 2011. The way the cases looked in the cylinder seems to indicate that the problem might be in only one or two chambers. 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. The SAAMI pressure limit for the 44 Special is 15,500 psi. The pressure can't be increased, for there is no margin left. Depending on the method of pressure testing the manufacturer uses. Today’s SAAMI pressure limits for the .44-40 and many other vintage blackpowder rounds are typically specified in copper units of pressure (CUP). That load will usually exceed the SAAMI pressure … All weapons manufactures adhere to the same standards. Rougher is -.009 thou, unless noted. The small ammunition manufacturer and the serious handloader are more and more able to get reasonably accurate chamber pressure readings from strain gage pressure test equipment. I'd like to use the Deerslayer this fall for whitetail. Outside Diameter Details .645″ for 20 & 28″.620″ for 11″ and Shorter Liners. SAAMI (Small Arms and Ammunition Manufacturers Institute) The organization that establishes firearm standards in the United States. 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. those proved to 960 bar (transducer) or, previously, 850 bar (crusher)), or magnum proof shotguns (i.e. pressures significantly in excess of the pressures associated with standard ammunition. Bullet Pull and Heavy 44 Loads; 44Mag and/or 45 Colt, Which way to go? Jaywalker Member. So if it is a book load, it is safe in a Contender, the much stronger Encore and every revolver that is chambered for that cartridge. What are the pressure signs to look for when loading widely accepted, yet highly suspected, high pressure .45-70 loads in the 1895 Marlin ? Also excessive pressure can be caused by brass being to long. 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) … L6: 3.700 inch = 93.98 mm Barrel Length: 26.0 inch = 660.4 mm Predicted Data for Indicated Charges of the Following Powders. 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. In .44 Mag, that means any load over about 1250 ft-lbs of energy, or anything in the +P or +P+ category. Matching Maximum Pressure: 56000 psi, or 386 Mpa These calculations refer to your specified settings in … by ©RGI Media, Inc - Published with permission. These … Condition: New product. As a result, gunmakers offered fewer revolver models chambered in .44 Special for several years. Chambered for 44 Magnum … The .44 Magnum is a serious handgun round and the second revolver cartridge to bear the name “Magnum” on its head stamp. If you … Threaded 5/8-24 NF on Chamber and Muzzle. 44 Remington Magnum Pistol SAAMI Chamber Reamer. On a final note, all my … The trim to length is equivalent to the minimum case length. So most manufacturers have downloaded some of their ammo, and you'll find that a lot of today's published reloading data is … COAL stands for … Discussion Starter • #1 • Sep 17, 2014. 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. Magnum cartridges, such as .357 Magnum or .44 Magnum, are usually developed by greatly increasing the working pressure of an existing cartridge, and the resulting cartridges are typically different in some small manner to prevent them from being chambered in firearms not specifically designed for them.For example, the .357 Magnum is slightly longer … Outside Diameter Details .640″ Chambered for 44 Magnum. (Now chambered full SAAMI Specifications) Rifle dimensions for our 44 Magnum Barrel Liners … I've also tested lightly compressed loads in .270win (RL22) and 6.5CM (various powders). It is all too easy to … 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 said, their very heaviest .44s are not recommended; the slow-twist barrel may not … 57 50 49 .22-250 65 59 … rc rcmodel, Dec 24, 2012 #11. Perhaps the hotter CCI's take the pressures up into the SAAMI max range in order to achieve their higher velocities. Barrel Liner Specifications . The .44 Remington Magnum made the scene in 1956, while Ruger and Smith & Wesson vied for the distinction of being the … The first level is up to the actual SAAMI … Cartridges with +P Pressures, list both the standard and +P Pressure. (1903-1938,) - 22,000 CUP (Exceeds SAAMI MAP) 44 Magnum - 22,100 up to 40,000 CUP PART 2, https://youtu.be/IKudU8QPdco 44 Magnum Barrel Liners / Blanks. CARTRIDGE: .300 Win. Some cartridges do not have either a PSI or CUP listed, and they are omitted. J. to evaluate internal case pressures (now superseded by the more precise pounds per square inch, or p.s.i.). Link to post Share on other sites. Some … .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. 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. Driftwood Johnson, SASS #38283. 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. (SAAMI) Bullet: .308, 180, Flatline - F T/R Useable Case Capaci: 81.648 grain H2O = 5.301 cm³ Cartridge O.A.L. 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. The industry Maximum average pressure for the 44 Magnum is 36,000 psi. Joined: May 28, 2003 Messages: … Just can't seem to find reloading info for the carbine, but plenty for handguns. That is what it was designed for. SAAMI, QuickLoad, lever action rifles and other curiosities…. The SAAMI Maximum Average Pressure (MAP) is listed in both the Copper Units of Pressure (CUP) and the Pounds per Square Inch (PSI). 44 Magnum Threaded Barrel Rifled and also Chambered for 44 Magnum or 44 Special All the liners / blanks we sell have been tested and can withstand the pressure of the round they are chambered for standalone. Max chamber pressures are set at relatively lower levels corresponding to the reduced strength capabilities of firearms that are more than a century old. 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. This is a CYA response as +P (plus pressure) would by definition exceed SAAMI MAXIMUM average pressure of 28,000 CUP. (Refer to Hodgdon’s load data.) 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. Pressures, Factory Loads 44-40 H.V. Recently the .44 Special … A. Smith. 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. 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. 2. Items that are in stock will ship within 7 days. 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. The document even includes info on pressure terminology, headspace gauges, and test barrels. 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. .44 Magnum & .357 Magnum were both reduced at the same time. More details . I'm trying to find reloading data for the 300 gr Hornady XTP. 3 Posts . My only compressed loads at present are a 44 Rem Mag Marlin 1894 loading with H110 and a 375H&H load with N150. Regarding the .44-40, today’s reloading manuals usually list recipes … Buffalo Bore Outdoorsman 38-44 SAAMI psi limits The MPSM (probable sample mean) for the 38 Spl +P 158 gr is 21.5k psi while MAP (average) is 20k psi. Mag. 59 50 51 .223 55 62 52 54 .219 Zip. Founded in 1926, SAAMI … When do I anticipate developing some class ? The SAAMI maximum pressure standard for the 44 SW special is 15,500 PSI. Compared with .22 Magnum, with its higher case capacity, peak pressure would probably mirror that of the CCI hot loads, up near the SAAMI … 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). The trim to length is equivalent to the minimum case length. 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. These cartridges, if they are to be fired from standard proof shotguns (i.e. +P vs. magnum cartridges. There are two questions I receive with some frequency 1. 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. Ken from … But as for asking it to contain pressure far beyond that, NO THANKS! and the higher pressure .38 Special +P was capped at about 22,200 c.u.p. In recent years the .44 Magnum… I suspect it had more to do with more accurate pressure measurement methods when electronic transducers took over from copper cylinders getting hammered shorter. I thought I would attempt … (now, 17,000 p.s.i.) Max loads for .44 Magnum that RRH's and DW's can shoot are in the 1550 ft-lbs energy range. The SAAMI specs call for a limit on the .44 Magnum of 36k psi (40k CUP). As for compressed loads, I haven't seen issues. Most pressure curves I've seen for black powder show peak pressure in about 90 - 125 microseconds, vs. smokeless in 150 - 250 microseconds. View All; CHAMBER PRESSURE & THE MODERN 45-70 LEVER-GUN. Some cartridges do not have either a PSI or CUP listed, and these values are omitted. Barrel Liner Specifications. Presenting an approach for how the small ammunition manufacturer and technical handloader can best use SAAMI Voluntary Pressure Standards. It should be since the .44 Magnum operates at about 2.5 times the maximum SAAMI pressure of the .45 Colt. 44 Mag; 45 Colt ; 454 Casull ; 45-70; 540 BFR ONLY ; Terms & Conditions; Contact Page; Garrett's Commentaries. It's capable of taking down extremely large game. Cartridges with +P Pressures, list both the standard and +P Pressure. While most pistol cartridges will … When he talks, people … If not in … At The Range. The SAAMI Maximum Average Pressure (MAP) is listed in both the Copper Units of Pressure (CUP) and the Pounds per Square Inch (PSI). 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