That puts 4955 solidly in the traditional range of the most useful powders for the 7mm Remington Magnum. 25-06 Rem. The results follow: IMR-4955 varied 0.7 grain; six charges were within 0.2 grain. I loaded 61.0 grains with Speer 145-grain BTSPs for a velocity of 3,044 fps. To see how well the Enduron Technology reduced buildup of copper fouling in the bore, I looked in the bore before and after shooting IMR-4955. Regards, Guy . The remaining portion of the expanded neck keeps the case tightly in the chamber at the shoulder and against the bolt face, and shooting them fireforms the brass to match the chamber with no stretching at the web. bullets and it gave good accuracy also. Note: For use with Rotary Case Trimmer and Rotary Case Trimmer—2 only. Load the cases with a minimum amount of powder listed in a handloading manual, add a bullet and fire them. Magnum. 31 fps; and Speer 175-grain Grand Slams varied 40 fps. 280 Rem. This two-die set is intended for reloading bottleneck cases, and consists of a Full-Length Sizer Die with an Expander-Decapping Unit, and a Seater Die with Bullet Seater Plug. Reloder 33’s burn rate is a bit too slow for general use in the 7mm Remington Magnum, but it fired Speer 175-grain Grand Slam bullets faster than other powders and gave the smallest group. of IMR 4831 with 150 Ballistic tips which has shot well in 3 different rifles. I used and liked IMR-4350 with 130 to 150 gr. 25-06 Rem. The bore was clean again after an hour’s soak with foaming bore cleaner, followed by a couple of patches to push out the gunk. Powders include Alliant A maximum amount of 7977 with 150-grain and heavier bullets fairly well filled a 7mm Remington Magnum case. That big of a stretch of 7mm Remington Magnum cases on the first firing has most likely excessively stretched the cases at the web and ruined them. 7mm Remington Magnum (Alliant Reloaders Guide) reloading data with 17 loads. The .223 Remington is one of the most widely used centerfire cartridges today. Low extreme velocity spreads are just as important as a powder’s capability to produce even velocity over a wide range of temperatures. They’re designed to stack easily, and feature an anti-rattle bullet-tip nest, empty case support, and long-lasting hinge. Sixty-nine grains of the powder with the Hornady bullet reached 2,866 fps from the Browning’s 26-inch barrel. Ultra Magnum. 300 H & H Magnum. So in anticipation of stepping up the performance of my 7mm Remington Magnum, new powders have been tested, including Alliant Reloder 17, 23 and 33; and IMR-4451, -4955 and -7977. Using bullets from Speer HP, Speer SP. The Full-Length Sizer Die brings the case to SAAMI minimum cartridge dimensions. They’re available in five sizes. 270 Win. Wolfe Publishing Company | 2180 Gulfstream Suite A | Prescott, AZ 86301. 260 Rem. RL-17 varied 0.4 grain; eight were within 0.2 grain. The 7mm Rem Mag is certainly not the most powerful 7mm. The included Seater Die has a built-in roll crimper to secure the bullet at the same time as it's seated. 243 Win. In contrast, cases that do not have a belt headspace on the shoulder and have a much tighter fit in a chamber. With a seated bullet, IMR-4451 does not completely fill a 7mm Magnum case. 257 Roberts. bullets (Nosler and Sierra) and gives me good accuracy. Posted: Wed Mar 25, 2015 2:15 pm . Cartridge : 7 mm Rem. Barrel Length : 26.0 inch = 660.4 mm. 30-06 Spring. ... RL26 in 7mm Rem Mag Update. 300 Rem. While the performance of all three is quite similar, IMR states the powder provides top performance in cartridges that include the .30-06 and .300 Winchester Short Magnum and is ideally suited for cartridges that thrive on powders in the midrate burn range. That resulted in some rather high extreme velocity spreads. However, group sizes were not all that much different than other powders shot in a Browning X-Bolt Speed rifle, which was used to shoot all the loads listed in the accompanying table. Mag. I've heard good things about RL-25 for heavier bullet weights as well. Winchester Supreme .270 Winchester cartridges measured only .003 inch shorter from the case head face to the datum line on the shoulder compared to fired Winchester cartridges. These “stick” powders do not dispense from a powder measure quite as precisely as spherical powders. Velocity spreads were also low: 53 fps with Swift 150-grain bullets to 25 fps with Speer 175-grain Grand Slams. This item is not available for pre-order at this time. The powder reduced, but did not eliminate, copper fouling, but it appears that it did make it easy to remove. I included it because on the Internet a fellow posted fantastic speeds he received with the powder and 140-grain bullets from his 7mm Remington Magnum. To start the reloading process I shot three 7 mm Rem. IMR-7977 varied 0.7 grain; four were within 0.2 grain. Hornady Brass 7mm Remington Mag Unprimed Bulk Bag of 100 . 257 Weatherby Magnum. ... reloading supplies and accessories. The other was the 7x61mm Sharpe & Hart, chambered in the infrequently en-countered Shultz & Larsen. They secure cases for trimming to length. WARNING: This product can expose you to chemicals including lead, which is known to the State of California to cause cancer and birth defects or other reproductive harm. All the powders listed here are extruded. IMR-4451’s burn rate is fairly fast for the 7mm Magnum but is an adequate choice paired with lighter bullets in the cartridge. Powder left in the reloader's powder measure hoppers for extended periods, overnight or several days, should be avoided. H4831 is also an excellent powder for the 7mm Rem mag, I used it quite a bit, particularly with heavy bullet loads, but the Reloader 22 worked so well that eventually I was using only RL-22 in the 7mm Rem mag. Short Magnum. Each die is made from case hardened steel, the inside surfaces are precision-drilled and reamed to exacting standards, and hand polished. RCBS Single Stage shell holders are built from hardened steel and designed to properly align the case with the reloading die in single-stage and turret presses. Reloder 25: Select A Caliber or Gauge Below To View Recipes. NORMA BRASS 7MM REMINGTON MAG UNPRIMED 100/bx . The large, oversized adjustment knob on the Matchmaster seater die has oversized letters and hash marks making it both precise to turn as well as easy to read.