Work up to 27 gr Accurate 2520. Your gun should have some freebore for these bullets (Wylde chamber). Set bullet .015"-.020" off the lands. Trim case to 1.75". These hulls like to stretch with heavy loads. Using a long inside neck chamfering tool will make a difference.
Fed Match works well if available. WSR will work well too. CCI might be harder for AR-15 type rifle.
The nickname for Accurate 2520 is "The Camp Perry Powder". This should be a hint.
It also may be the best powder for the 168-175 gr Match bullet in the 308/7.62mm.
Bulge,
The AA2520 is a good powder to start with.Winchester brass/cci small rifle mag.primer/25.5gr.2520/69gr.sierra hpbt match.If you are shooting a military style m 16 cci makes a primer that has a thick cup to prvent slam fires it is a # 41. Shoot well,shoot often.
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