The Firing Line Forums - View Single Post - .223 Loaded with 55gr FMJ and 24.5gr H335 Velocity?

Clark · May 13, 2011, 10:09 AM

CAUTION: The following post includes loading data beyond currently published maximums for this cartridge. USE AT YOUR OWN RISK. Neither the writer, The Firing Line, nor the staff of TFL assume any liability for any damage or injury resulting from use of this information.

55 gr H335 .223 has a threshold of long brass life between 29 and 30 gr.

This is much higher than published loads because the .223 was SAAMI registered at 55kpsi, but can run more than 75kpsi.

It has 10X the loose primer pocket safety margin per SAAMI registration of 270W, 6mmRem, or 22-250Rem.

May 13, 2011, 10:09 AM	#7
Clark Senior Member Join Date: December 4, 1999 Location: WA, the ever blue state Posts: 4,678	CAUTION: The following post includes loading data beyond currently published maximums for this cartridge. USE AT YOUR OWN RISK. Neither the writer, The Firing Line, nor the staff of TFL assume any liability for any damage or injury resulting from use of this information. 55 gr H335 .223 has a threshold of long brass life between 29 and 30 gr. This is much higher than published loads because the .223 was SAAMI registered at 55kpsi, but can run more than 75kpsi. It has 10X the loose primer pocket safety margin per SAAMI registration of 270W, 6mmRem, or 22-250Rem. __________________ The word 'forum" does not mean "not criticizing books." "Ad hominem fallacy" is not the same as point by point criticism of books. If you bought the book, and believe it all, it may FEEL like an ad hominem attack, but you might strive to accept other points of view may exist. Are we a nation of competing ideas, or a nation of forced conformity of thought?