Originally Posted By: venaticOriginally Posted By: willy1947
From the June American Rifleman, page 64.
Western Powders Reloading & Load Data Guide.
"Loaded in the higher-pressure 5,56x45 mm NATO cartridge, the same projectile reportedly hit 2701 f.p.s. with a pressure of 60,052 p.s.i. virtually identical to the .224, so performance will be similar"
Projectile was a 90-gr HPBT MatchKing.
So don't run off and throw your 223 bolt guns away.
Just go buy the Western Powders Reloading & Load Data Guide.
If it makes you feel better take a felt tip and write Valkyrie on your barrel.
For AR guys; If you own a 6,8mm SPECII just load 90gr HPBT.
What length barrel and how long will .223 brass last at those pressures? I can run those speeds from an 18 inch barrel at pressures safe in an AR and have decent brass life in the Valkrie.
Comparing 6.8 90gr??? whats the BC on that bullet?
Well, you must have bought one. It was a writers campaign. People get paid to write up this stuff. Like it is the one to save the world. I know I wrote the crap for years. I have to laugh. Go to an F-class shoot and see if you find one or even Camp Perry. I knew a fellow told me "he could sell a poop sandwich". I read behind the lines you spent your money on "A poop sandwich". I have been reading, loading and shooting for 57 years. I still shoot the 220 swift because there is nothing better. I just turned 71 in June.
Stop reading Magazines and buy the two volume set of "Small Arms Design and Ballistics" by Townsend Whelen. "The Red Book" is a good read. It has all been done before. They change the names to get your money.