So i have a good load for my 223 bolt with 69 smk and RL15 . But im low on FED brass but have a lot of LC brass . How much can or should i reduce my loads . .... also why do some guns prefer sierra over hornady bullets OR the other way around ?
- Thread starter cjmac1988
- Start date
Go to the link below, you will see that Lake City brass has the "MOST" case capacity, BUT LC and Federal brass are very close in case capacity. Meaning if your not shooting max loads in your Federal cases switching to Lake City cases are not a problem.
223 Rem + 223 AI Cartridge Guide within AccurateShooter.com
Below are Quickload pressure and velocity charts for .223/5.56 brass with cases with the most H2O capacity and the least case capacity with identical charges of H335 powder. There is 6,000 psi differance is chamber pressure between these two cases.
Below a Lake City case with 30.6 grains of H2O capacity
Below is a case with 28.8 grains of H2O capacity
With .308/7.62 cases the military cases held 2 grains less of water and would create higher pressures. The Lake City 5.56 military cases have "MORE" case capacity than the average commercial case and therefore generate less pressure.
Because each rifles barrel will vibrate differently and the powder charge and bullet effect how the barrel vibrates and thus effecting accuracy. I have two AR15s and a Savage .223 and they all "vibrate differently".
Or if you watch the 1969 movie "Easy Rider" with Peter Fonda, Dennis Hopper and Jack Nicholson, Dennis Hopper explains it best.
Dennis Hopper: “I'm getting bad vibes man”
The movie came out the just before I went into the military in 1969, my Drill Sergeant said my second most memorable quote.
Drill Sergeant: The two biggest motivators in the world are fear and greed, and I don't sign your paychecks!
And then the "bad vibes" really started.
Last edited:
