That’s the max load for 223 Remington chamber. I’m running a Wylde chamber and can run to 5.56 pressures. the hornady manual they have 5.56 data for AR comp, that’s where i got my start point. the Sierra has a lot less bearing surface than the 75gr eld-m as well so using hornady data shouldn’t be an issue.. For those that are using 223 remimgtons I would definitely back off my load or get your chamber cut to a 223 Wylde chamber.
Last edited by 79S; 04/29/20.
Originally Posted by Bricktop
Then STFU. The rest of your statement is superflous bullshit with no real bearing on this discussion other than to massage your own ego.