These figures represent the Maximum Average Pressure (MAP), meaning the recommended maximum pressure level for loading commercial ammunition. 280 Remington at 60,000psi versus 65,000psi for the. Regarding pressures, SAAMI currently rate the. The 1:10 twist is somewhat of a shame considering that the 1:9 twist rate is ideal for 120-180 grain bullets. The Winchester M70 rifles in circulation feature 1:9.5 twist barrels while Remington currently (2012) use a 1:10 twist barrel, optimized for the many 140 grain factory loads. Weatherby and Sako have traditionally utilized 1:10 inch twist barrels which for hand loaders can be too slow for optimum accuracy with160 grain bullets. Most major firearm manufacturers now offer factory standard rifles in. 280 is also suitable for high power long range competition however recoil and throat wear are considered extreme in comparison to currently favored cartridges. 280 Ackley Improved wildcat, highly favored cartridges for long range hunters wanting to build light and set limits on recoil accordingly, recoil to both the shooter and rifle platform. The combination of high BC’s combined with mild recoil, have made the. In recent years, the availability of extremely high BC 7mm projectiles has breathed new life into the. Factory ammunition users still have a rather limited choice of somewhat lack luster ammunition however hand loaders have never had it better. 30-06 while 7mm fans chose either the compact 7mm08 or the highly emphatic 7mm Remington Magnum or the later 7mmWSM. 280 was its ability to utilize longer, sleek 160-162 grain bullets. 270 in barrels of equal length with 140 to 150 grain bullets. 280 showed an irrelevant 20-50fps gain in velocity over the. This argument was relevant to the 140 grain bullet weight, popular with both. 270 which therefore cancelled out any velocity gain. 280, while having slightly higher velocity, had poorer ballistic coefficients than the. Arguments then began over the fact that the. 280 could achieve higher velocities than the. A hot topic for some time was the question of whether the forwards shoulder and slightly wider bore of the. 280 versus the long time worldwide favorite. In gun magazine columns of the 1990’s, technical editors were bombarded with letters asking about the performance of the. 280 in the States via published literature and by the early 1990's, hunters from all over the world started to take more interest in the performance of the. Outside of the U.S, hunters began to notice the growing popularity of the. 280 caliber M700 rifles exceeded production. 280 was a strong contender as an all-round medium game cartridge and for a brief period, during the late 1980's, demand for. Twenty years after its introduction hunters finally began to realize that the. 30-06, while still having the high shock at extended ranges and flat trajectory of the. 280 had both the potential to fire heavy bullets of a similar weight to the. It was a long time before hunters began to notice that the.
Over time, due to confusion between the 7mm Express Remington and the 7mm Remington Magnum, the cartridge finally went back to it's original name, the.
During the name change initial confusion resulted in one production run of barrels having 7mm06 stamped on them. 280 cartridge as the 7mm Express Remington in an effort to bring attention to this newly improved performance. In 1979, Remington increased the powder charges of. 280 was available in all of Remington's action configurations however the cartridge still failed to gain attention. 280 occurred after the release of the 7mm Remington Magnum in 1962, a cartridge which went on to become one of the most popular cartridges in American history. 280.Ī further blow to the general acceptance of the. Later, Remington introduced a 165 grain round nosed bullet at an advertised 2820fps but at true velocities of around 2680 to 2750 and with a poor aerodynamic form, this did nothing to help the. 270 Winchester was loaded to higher pressures, giving much higher velocity, thus the. The first factory load featured a 150 grain bullet at an advertised velocity of 2810fps but in sporting rifles, true velocities were closer to 2670 to 2740fps. To function smoothly in the auto loader, factory ammunition was loaded to mild pressures. 280 was chambered in the Remington Model 740 semi automatic rifle. 280 ammunition being accidentally fed into. Although the 7mm-06 wildcat had been in existence for quite some time, the commercial version differed in that the shoulder was set slightly further forwards than the famous. The resulting cartridge was based on the. Various sources suggest that Remington engineers were interested in creating a high powered 7mm cartridge for several years before reaching their long term goal.