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golfnutrlv · January 20, 2012, 10:58 PM

Does anyone have experience loading Sierra 69 Grain Matchking's in 5.56 rated brass? Specifically Lake City? (Not the Match grade)

Rifle is a 5.56rated M&P15 16" carbine. (Which is very accurate)

None of my manuals list any data. Hornady has a service rifle section, but they used .223 cases...

Also, what brass do you use for match grade .223 handloads?

I use Lapua in my .308, but seems kind of expensive, and easy to lose in an autoloader.

Winchester was my other first choice, but I have had problems with the necks splitting after only one loading.

Thanks all...

January 20, 2012, 10:58 PM	#1
golfnutrlv Senior Member Join Date: November 5, 2008 Location: Spokane, WA Posts: 1,347	Sierra 69 Grain bullets in 5.56mm Brass Does anyone have experience loading Sierra 69 Grain Matchking's in 5.56 rated brass? Specifically Lake City? (Not the Match grade) Rifle is a 5.56rated M&P15 16" carbine. (Which is very accurate) None of my manuals list any data. Hornady has a service rifle section, but they used .223 cases... Also, what brass do you use for match grade .223 handloads? I use Lapua in my .308, but seems kind of expensive, and easy to lose in an autoloader. Winchester was my other first choice, but I have had problems with the necks splitting after only one loading. Thanks all... __________________ ΜΟΛΩΝ ΛΑΒΕ VIGILIA PRETIUM LIBERTATIS "The price of liberty is vigilance" America is at an awkward stage. It's too late to work within the system, but too early to shoot the bastards.