help with .223 sierra's for Nork M4

[FLUXCORE]

Well I've got a ton of varget to use up so I picked up some 223 win brass along with some .223 sierra 55gr FMJ so i can do some shooting this weekend Ill be shooting with my nork M4 and was checking if anyone has any tips on charge or OAL for feeding. My shop was all out of A-MAX this will be my firs time shooting sierra's

 

[FLUXCORE]

well, ill start at 24gr, 24.5gr, 25gr, 25.5gr, 26gr and see what that tells me. Im hoping to find a sweet spot in there. Ill post my results

 

[tiriaq]

For overall length, just make sure the rounds fit the magazine.

 

[sunray]

You'd best buy a loading manual and work up the load from the starting load.

 

[Ron AKA]

A good place to start would be to use the Sierra AR-15 Load Guide. Varget min 25.1 to max 27.2. Good to download and save for future reference.