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Description
This is new 300 AAC Blackout ammo with 147 gr FMJ bullets w/ cannelure. All components are new and the head stamp says MAST 300 BLK. The average velocity is 1850 FPS. This ammo contains a Mil-Spec #41 Small rifle primer and the use of a traditional bolt gun could result in misfires due to the thicker cup primer.
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Comments (2)
I have been using these to break in a new build. Actual fps that I am getting at 25' F is 1435 average with a spread of 52fps between high and low. The powder is a little on the dirty side, but I am getting 1.5 in spreads at 100 yards using a 16" SOTA barrel with carbine length tube and a free float guard off a bench bag.
Warning! This is squib ammo & MAST tech are Crooks! I have had multiple failures! I purchased some that was improperly loaded with the wrong caliber projectile! I conacted MAST and they denied they ever made 300 aac ammo! Unbelievable.