The most common 6.5 Grendel bullet weight is 123-grains. The best comparison of two different cartridges is with a similar weight and style of bullets. Common 123 grain 6.5 Grendel loads are faster and more powerful than the 125-grain 300-Blackout loads. My personal 6.5 Grendel AR with a 16-inch Bear Creek Arsenal upper 6.5 Grendel is More Powerful Than 300-BlackoutĦ.5 Grendel Has 40 percent more initial bullet energy and 400 fps more velocity than the 300-Blackout given similar weight bullets. The Grendel was developed for general hunting and military use to 400-yards, but the Blackout was designed primarily for tactical use with a suppressor within 100-yards. The Blackout’s shorter and fatter design sheds energy faster (has more drag) than the slimmer Grendel bullet, and it starts out with significantly less power. Not that that’s a reason t throw it out, it’s just a short-range rifle. At 100-yards, Blackout hunting loads are only expanding a very little bit. 200-yards is just too far for the Blackout.Īs a bullet slows down, it expands less and less until it doesn’t expand at all. Most hog hunters try to keep their shots within 100-yards, but some will shoot 150-yards. It’s one of the popular AR cartridges for hog hunting. The 300 Blackout really tends to lack expansion compared to the Grendel, but it still seems to work well enough on deer and hogs at 100-yards. The Grendel is generally functional to 400-Yards before it gets too slow to reliably expand. That’s about 125-yards for most supersonic Blackout loads. Most bullets fail to expand at velocities under 1800 fps. The Blackout is a slow cartridge, and velocity is what causes bullet expansion. But, there’s still great bullets for both Expansion and Velocity
264 bullets used in the Grendel are less common, so there’s less of a selection to choose from.
The 30-caliber 300-Blackout will tend to make a wider hole, but it won’t penetrate as much as a comparable bullet in 6.5 Grendel.ģ0-caliber (.308 actually) is a common bullet size, so there’s a wider selection of available bullets for the Blackout both in factory ammo and for reloading. There is a notable difference between the 30 calibers and 26 caliber diameter, especially after bullet expansion. Because the Blackout is wider, yet they tend to have similar weight, the Blackout has a lower Ballistic Coefficient than the 6.5 Grendel. Most bullets from both cartridges weigh around 125-Grains. The 6.5 Grendel is a lower to mid-power 26 caliber cartridge. The 300-Blackout is a lower-power 30-caliber cartridge. Basic Muzzleloader Ballistics as tested by Parker Productions 30 Caliber vs 26 Caliber
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