The 5.56 / .223 pressure discussion - Page 2
Firearm & Gun Forum - FireArmsTalk.com > Long Guns > Auto & Semi-Auto Discussion > AR-15 Discussion > The 5.56 / .223 pressure discussion

Reply
 
LinkBack Thread Tools Display Modes
Old 02-10-2014, 08:12 AM   #11
Feedback Score: 1 reviews
 
Join Date: Sep 2013
Location: Central Calif. along Sierra Nevada FoothillsI
Posts: 529
Liked 237 Times on 177 Posts
Likes Given: 381

Default Volume

Quote:
Originally Posted by JonM View Post
your not going to see any difference in a 55grain fmj. its things like surplus ss109 tracers and other special use cartridges.

bullets for the 556 has a larger allowance in how far the ogive can be down the body of the bullet at its widest point which in the diagram is the S measurement. due to the need to keep the same weight when your putting in a phosphorous charge or a steel penetrator the displaced lead has to be moved further up in the bullet body making that S measurement further out.

the reason folks say dont use 556 in a 223 is because we have no idea what ammo your using where it came from and if it was made to a lesser standard. some countries use a lead alloy or a steel jacket or some other funky stuff which can make the S measurement safe for a 556 but not for a 223
JonM: Do you know if there is a difference in volume between the 5.56 and .223 shell? Note: I only have 5.56 shells
__________________
bradam is offline  
 
Reply With Quote
Old 02-10-2014, 08:16 AM   #12
Feedback Score: 1 reviews
 
Join Date: Sep 2013
Location: Central Calif. along Sierra Nevada FoothillsI
Posts: 529
Liked 237 Times on 177 Posts
Likes Given: 381

Default never mind

Quote:
Originally Posted by bradam View Post
JonM: Do you know if there is a difference in volume between the 5.56 and .223 shell? Note: I only have 5.56 shells
I apologize:I read on and found the answer
__________________
bradam is offline  
 
Reply With Quote
Reply

Thread Tools
Display Modes


Similar Threads
Thread Thread Starter Firearms Forum Replies Last Post
Pressure Curt Ammunition & Reloading 5 06-13-2013 02:10 PM
Pressure VS. Velocity jeepcreep927 Ammunition & Reloading 9 05-04-2011 02:53 PM
Kermit Under Pressure..... IGETEVEN The Club House 7 10-06-2010 12:08 AM
Pressure works NGIB Politics, Religion and Controversy 1 04-09-2010 02:17 PM
Trigger pressure jmoore2020 General Handgun Discussion 5 09-26-2008 11:54 PM