How critical is case volume?

[bigedp51]

as far as LC brass being harder or lasting longer than lapua i have to disagree there...

Looks like your in for a education on brass hardness.

All military Lake City and American commercially made 5.56 ammunition made for the military has the hardest brass in the base of "ANY" .223 cartridge case.

TEST RESULTS
Using Rockwell hardness standards (.062″x100kg, Rockwell “B”), the brass measured as follows:

LC 2008 = 96
Lapua 223 Match = 86
Winchester 223 = 69
Remington “R-P” = 49

How Hard is Your Brass? 5.56 and .223 Rem Base Hardness Tests
(my buddy CatShooter at AccurateShooter printed this information below the last time someone wanted to debate .223/5.56 brass hardness)
http://bulletin.accurateshooter.com/...ardness-tests/

Not only is the brass harder, the flash hole web is also thicker, meaning the primer pockets last longer. Below Lake City 5.56 on the right and left and Federal .223 in the center.







Soft 5.56 brass was part of the jamming problem with the early M16 rifles and the brass has been made harder since the 1967 Congressional investigations.



Now you shouldn't have any more doubt about how well made Lake City brass is.

Signed
bigedp51 the hard ass