That shouldn’t be surprising at all, especially considering that the .450 Marlin was literally designed to mimic the performance of magnum .45-70 ammo. Ballistics. The .450 has a slight edge with the Hornady ammo, but the script flips in favor of the .45-70 with the Buffalo Bore ammo. Bore Tech’s AR-15/AR-10 BORE GUIDES precisely align cleaning rods with the rifle bore and prevent damage to both the firearm and cleaning rod making it a necessary tool for proper cleaning and protection of your firearms. Mine is as accurate as any 45-70 I own ( two, both single shots). The .450 Bushmaster’s MAP (maximum average pressure) of 38,500 psi is only slightly greater than typical big-bore magnum handgun pressures, so it’s not surprising that it’s loaded with similar burn rate propellants. A ten round 5.56 holds three 450 Bushmaster. If you want a closer look at the history behind this powerful cartridge, its specifications, who it’s for and how to build a .450 Bushmaster rifle, then you’ll love this article.. Let’s get started! Additionally, but not across the board, many are factory outfitted with muzzle brakes to help mitigate some of the angry mule in the cartridge-rifle combination. bullet and produces recoil unlike that of the standard .223 Rem. Many gun owners are not prepared for the power behind the .450 Bushmaster shot, especially if unaccustomed to shooting with anything but lower-power rounds. Made from either anodized aluminum or machined Delrin. Lastly, We’re taking a look at this Faxon Firearms AR-15 Gunner Big Barrel Bore.450 Bushmaster.This is a premium quality barrel design made in the USA and certainly will enhance your .450 round shooting experience, when compared to an average barrel. The Dewey Weapon Specific Cleaning Rod Guides replace the bolt in your action while cleaning. By and large, .450 Bushmaster rifles are outfitted with medium to heavy contour barrels, a function of its large bore. The 450 Bushmaster Carbine (above, top) in its factory form, is a semi-automatic AR design that uses a large .45-cal. Concerning its ballistics, the .450 Bushmaster is a high-pressure round with a maximum pressure of 40,000 psi as established by the Small Arms and Ammunition Manufacturers Institute (SAAMI) and is capable of firing a .45 caliber, 250 grain, bullet … Shooters predominantly use 223/5.56×45 in AR-styled carbines. Because the .450 Bushmaster is used primarily in AR-style rifles, I believe it’s worth comparing this round to the .223 Remington. A semi auto 45-70 that never gives a minute of trouble is unbelievable. Weapon Specific Bore Guides. The .223 is a lighting-fast cartridge that delivers blazing muzzle velocities over 3,000 feet per second, far outpacing the .450 Bushmaster. While “Big Bore” mania has been circulating for a while now, a newer cartridge is finding its way to the head of the popularity pack: The .450 Bushmaster.. .450 Bushmaster Ammo Federal Fusion 450 Bushmaster 260gr is a bonded soft point ammo designed specifically for hunting. Oh and a AR 15 is way more affordable than a AR 10. Since I would be firing half of the test loads in an AR, I chose to use CCI #41 mil-spec Small Rifle primers. 3 Faxon Firearms – AR-15 Gunner Big Barrel Bore .450 Bushmaster. The guide allows the cleaning rods to go straight into the bore without harming the chamber or throat. Wondering why someone would want a 450 Bushmaster is like asking why you would want Thor’s hammer. Hands down the most important benefit of a muzzle brake, taming the powerful .450 Bushmaster, enhances field performance, accuracy, and recovery time between shots.