Any luck with imr-4320 in 223/5.56 55/62gr

[jeeptim]

Got a deal on 4lb of imr-4320 understand it works in 223 and has lots of load data but how well has your rounds worked.

 

[highbrow]

24 gr 4320 was my accuracy load with 80gr Nosler match bullets for Highpower.
Used the same charge for 55-69gr bullets as I did not want change my powder measure.

 

[spitballer]

I would not underestimate the power of IMR 4320 to build pressure in longer barrels. With 55 grain bullets I've actually done much better at 22.5 grains than I have at the suggested starting load of 23.5 grains. This in a Rem 700 bolt action .223. Still experimenting with this powder.

 

[Speedster00]

Not with that bullet but I use 4320 in my 308 AR and love it.