Index – 300blk electricity test physics

Parts wise, not much! Just a new barrel, chambered in 300 blackout. All other parts interchange, which was part of the deign goal of the caliber. Because the AR-15 platform is so modular, many users find that it is best to have a fully built upper receiver in 300 blackout so they can swap back and forth quickly between calibers. Several vendors sell upper receivers, as well as complete firearms in the caliber.

Unfortunately, any relatively new cartridge will cost more than other well-established ones due to the economies of scale. New tooling is not cheap and those investments are made up by the increased cost, as well as the ability to charge for a caliber that has a high demand. The good news is yes, you can reload and in some cases, cut your cost by over 1/2. See our reloading wiki page for all the details if you are interested!

Absolutely. In fact, you start to really see the advantages of the cartridges over other common centerfire chamberings in the AR-15 platform with short barreled weapons. Pistol length barrels shine for a couple reasons with the 300 blk. First, the 300 blk uses a fast burning powder that burns entirely in the first ~8 inches of the barrel. Due to this, there is no fireball like you see out of an AR-15 using 5.56 chamber and a short barrel. Reduced concussion, and flash are a bonus, but you also can get plenty of velocity, even with short barrels, making a 8" barrel a viable hunting and home defense length! Bullet weights and loads will determine your velocity and lb/ft energy, but rest assured a short barrel for the blackout is perfectly suited.

Sure! Hunters typically care about 3 important things. Weight they have to carry, effective killing power for humane kills, and accuracy in the ranges they hunt at. First, since a 300 blackout can be effective at much shorter barrel lengths, the rifle will weigh less to do the same job for moderate ( [gunbot.net](http://gunbot.net/ammo/rifle/300blackout/) is a great resource for all sorts of ammo, as well as reloading components when you do make the plunge.

> Parts wise, not much! Just a new barrel, chambered in 300 blackout. All other parts interchange, which was part of the deign goal of the caliber. Because the AR-15 platform is so modular, many users find that it is best to have a fully built upper receiver in 300 blackout so they can swap back and forth quickly between calibers. Several vendors sell upper receivers, as well as complete firearms in the caliber.

> Unfortunately, any relatively new cartridge will cost more than other well-established ones due to the economies of scale. New tooling is not cheap and those investments are made up by the increased cost, as well as the ability to charge for a caliber that has a high demand. The good news is yes, you can reload and in some cases, cut your cost by over 1/2. See our reloading wiki page for all the details if you are interested!

> Absolutely. In fact, you start to really see the advantages of the cartridges over other common centerfire chamberings in the AR-15 platform with short barreled weapons. Pistol length barrels shine for a couple reasons with the 300 blk. First, the 300 blk uses a fast burning powder that burns entirely in the first ~8 inches of the barrel. Due to this, there is no fireball like you see out of an AR-15 using 5.56 chamber and a short barrel. Reduced concussion, and flash are a bonus, but you also can get plenty of velocity, even with short barrels, making a 8" barrel a viable hunting and home defense length! Bullet weights and loads will determine your velocity and lb/ft energy, but rest assured a short barrel for the blackout is perfectly suited.

> Sure! Hunters typically care about 3 important things. Weight they have to carry, effective killing power for humane kills, and accuracy in the ranges they hunt at. First, since a 300 blackout can be effective at much shorter barrel lengths, the rifle will weigh less to do the same job for moderate ( OSHA has published requirements on what is hearing safe and what is not hearing safe that you can read up on, but ultimately a single shot from a suppressed 300 blackout can be more quiet than a suppressed 9mm sub-machine gun. Since hearing loss is cumulative, doing massive mag dumps without ear pro is not advisable. Your effective dB reduction in sound will be ultimately determined by your suppressor, and specific load data. Supersonics will still produce a supersonic crack. Subsonics, will not, but the retort is still often over 100 dB. 300 blackout rifles have been made to produce sounds akin to a loud air rifle or .22.

>There is no subjective way to answer that question. There are also MANY reputable vendors of 300 black rifles, pistols, and barrels now that popularity has increased. The best answer in a FAQ would be the one you like the best that is in stock for the cheapest price.

>The generalist twist rate that shoot up to the heavy 220 grain bullets for subsonic use is a 1-8 twist rate. Other twists can be ordered from many barrel manufacturers to get better stabilization on the bullets you intend to shoot. Lighter bullets may find advantage in a different twist, but then you will not run subsonic bullets as well, which is the majority of the cartridge’s appeal.

> Many people consider pistol length gas systems to be ideal for barrel lengths Likely you have one or a combination of the following problems. Buffer assembly too heavy, incorrectly aligned gas block, not enough gas generated from cartridge, lack of lubrication. Try cleaning the firearm, lubricating the bolt and bolt carrier. H2 buffers or lighter, can also improve cycling on 300 black gas systems. Also check the gas block on your AR-15 pattern rifle is aligned correctly with the gas port in the barrel. Some gas blocks were designed to have a gap between the shoulder of the barrel and the gas block itself, and having the gas block butted up against this will misalign the hole in the barrel with the hole in the block. If you are reloading, you may need to increase powder weights until you get cycling. If you are running a suppressor, you will want to have it on to see if the suppressor back pressure will help with cycling. Some loads on the edge of cycling will cycle with the suppressor on and no cycle with the suppressor off the firearm. Only begin suppressor testing when you are sure the load stabilizes out of your gun! If all else fails some people have had luck enlarging the gas port on the barrel to increase gas flow to the bolt, but this should be a last ditch effort.

> We have no good answers at this time. Some have had success with promises of shoe closet grandeur. Others have accepted the 300 blackout life as the sleeping on the couch life. If you have a good solution message a mod so we can add it to the FAQ.