American Gen 2, .223

[Mobuck]

Regardless of the 223/5.56 confusion, firing a heavy bullet load worked up for a different rifle and chamber goes against most recommendations especially if the bullet is jammed into the leade.

 

[Joey]

Regardless of the 223/5.56 confusion, firing a heavy bullet load worked up for a different rifle and chamber goes against most recommendations especially if the bullet is jammed into the leade.

I agree, and I definitely should have known better. I have some reloads , 55 gr fmj and sp, loaded for my Cz FS, after 2 rounds of the 69 gr, we went to them. They are hunting rounds loaded to manual specs, or basically commercial rounds. We finished out the day with them. I am going to get some chamber/throat msmts so I can tailor a load just for this rifle. I know it isn't a 1/8 moa target rifle, but I enjoy it, so what the hey.

 

[Sam Summey]

Uh oh.....I feel the 223 REM vs 5.56 debate possibly brewing up......standby!

"they are the same"
"556 is more powerful"
"223 has thinner walls and won't withstand 556 pressures"
"556 cant fit in a 223 chamber"
"556 will damage a 223 chamber"

The NATO chamber is the same as the Remington except the lead into the rifling. Brass is brass, some is thicker than others thus less volume which will drive the pressures up. I don't recommend mixing headstamps if consistency/accuracy past 100 yards is an issue. 90 percent of the AR shooters are just shooting at the dirt anyway, past a 100 yard shot is considered "long range" by most. Unless it is a reactive target, 22 caliber holes are impossible to see at 300 yards and beyond, unless a luminous reflector is behind the target.

 

[Joey]

The NATO chamber is the same as the Remington except the lead into the rifling. Brass is brass, some is thicker than others thus less volume which will drive the pressures up. I don't recommend mixing headstamps if consistency/accuracy past 100 yards is an issue. 90 percent of the AR shooters are just shooting at the dirt anyway, past a 100 yard shot is considered "long range" by most. Unless it is a reactive target, 22 caliber holes are impossible to see at 300 yards and beyond, unless a luminous reflector is behind the target.

Probably going to stir up a hornets nest, but what the.... I am a RSO at our local range. 75% of the firearms brought on the range are AR platforms. 80% are new shooters who have just learned which end of the rifle is which. Most spend a good part of their time working on the rifle, fidgeting with the scope, etc. I keep a VERY close eye on these types. However, a well put together AR in the hands of a shooter is very accurate to 500 yards, with the right load. I also run the 300 yard shoot each month. We have guys that shoot 1/2 moa and smaller on a regular basis. A good shooter can take a bad firearm and score with it. A bad shooter can't take a good firearm and hit with it. Just my observations.