300 blackout subsonic load data blue dot

Today there are dedicated magazines, like those from Magpul, that address these minor variations. This lead to some problems as the shape of the ogives and bearing surfaces created geometry issues with feeding in AR mags. As I mentioned, many of the early loads were made with existing. The first real point of advancement was the shape of the bullets for this cartridge. I was loading 168gr bullets in cut-down NATO brass at barely 1,500fps from an 8” barrel! I eventually parted ways from the cartridge for a while and when I came back to it, there had been an explosion of available options. I remember those days fondly and I recall scratching my head at my very first AR pistol in the caliber. There were no specialty options and the average shooter had to make due with 147gr pulled military bullets and whatever magnum pistol or shotgun powders they had around. The early days of the cartridge saw most factory ammo being loaded with off-the-shelf powders and bullets. 300 Blackout has seen something of an interesting road as far as reloading is concerned. It has always been something that relaxed me and allowed me to exercise a bit of creativity in my hobbies. I have been reloading ammo for more than half my life. For this article I will be looking at reloading for use in a semiautomatic rifle and the things that are necessary for this cartridge to perform reliably in a standard direct-gas AR.

Most people that own weapons in this caliber are using semiautomatic rifles, but there are a fair number of individuals that have bolt actions and even single-shot guns. 300 Blackout is something of a reloader’s dream cartridge.

300 blackout subsonic load data blue dot