He began hunting the West on a DIY budget hunting an average of 30 days a year for mule deer. While rangefinders and range-compensating scopes (both turret-style and hash mark) have lessened the need for near-horizontal trajectory, in the real world of hunting for big mule deer, flat trajectory is still very important. Units of Measure. Robby believes all of creation is from God for man to manage, respect, and through which to know its Creator. 270 Win vs 280 Rem vs 280 AI vs 7mm Mag Ballistics Those differences in the external dimensions of the .270 Winchester, .280 Remington, .280 Ackley Improved, and 7mm Remington Magnum do translate into differences in ballistic performance, though probably not quite as much as you’d initially expect. As illustrated in the chart,.270 WSM Winchester Short Magnum rounds - on average - achieve a velocity of about 3240 feet per second (fps) while 7mm-08 Remington rounds travel at a velocity of 2830 fps. On average you’ll need a heavier 7mm bullet which will produce more recoil IN AN ULTRALIGHT rifle like the one I’m putting together for this project. For many years we couldn’t get new (Norma) ammo and had to re-load; my ex visited Sweden in 1982 and bought a half dozen boxes. .270 versus 7mm Rem Mag. (5.1%) faster than the 160 grain 7mm load. The release of the .270 Winchester in 1925 in the Winchester Model 54 rifle saw the beginning of the American love affair with velocity, as well as the laying of a solid foundation for the American bolt-action sporting rifle.At the time, the lever gun held court in the hunting fields, though through the writings of Mr. … Units of Measure. Find cheap, bulk rifle ammo - 22 long rifle, winchester, 6.5 creedmoor, and more. By David E. Petzal. That gave me the confidence to finally make the switch. All rights reserved. Not a gun guy myself. The 7mm Rem. Often a hunter has to make split-second decisions without a rangefinder and has little time to prepare for an accurate shot. Mag. Christensen Arms remedies this with an ejectable magazine that extends below the stock. Robby has scouted and hunted literally thousands of square miles of mule deer country and brings a wealth of knowledge about these experiences with him. (And by the way, did you see Trevor Carlson’s review on your amazon page? The .300 Weatherby Magnum has a longer case length of 2.825" (71.76mm). You do leave some energy and trajectory on the table, though. As illustrated in the chart,.270 WSM Winchester Short Magnum rounds - on average - achieve a velocity of about 3240 feet per second (fps) while 7mm-08 Remington rounds travel at a velocity of 2830 fps. actually preceded it by 18 years. To put this into perspective, a Boeing 737 commercial airliner travels at a cruising speed of 600 mph, or … The .270 WSM is the third in what is now called the trio of .270 (.277”) caliber commercial cartridges. Again, the plan would be to load the 270 WSM with the Berger 170 EOLs (I found some load info indicating a MV around 3050 or so), and off-the-shelf ammo would only be a backup plan. Actually got them back through LaGuardia, too. Compare all 7mm Remington Magnum ammunition manufacturers on one easy to read chart. a Japanese 6.5 which I hated.) I guided for years in eastern Oregon, Union and Baker County mostly. Thanks for the book. The math works out that this gun will produce a five-inch flatter trajectory over my 7mm Rem. He figured, for me and what/when/how I hunted, that .25-06 was just ideal for me. Robby Denning started hunting mule deer in the late 1970’s, only missing one season in 35 years. 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