308 WIN 180 Grain Sierra SP


31 in stock (can be backordered)


1040 FPS, priced per 100 rounds. Once-fired WCC brass and Sierra 180 grain lead soft point bullet. This bullet will stabilize in 1:12″ twist or faster (1:11″ and 1:10″ or fastger will work fine). The 308 Win subsonic will NOT cycle a semi auto, since these are a lower pressure round (I do offer a CYCLING subsonic in the 200 grain Expanding sub!! Contact us for details!)

See our write up on Tacical Gun Review. http://tacticalgunreview.com/308-subsonic-ammo-testing/

Please call or email for other bullet options, also.

Price per 100 rounds.

Why use a 180 grain Sierra SP (soft point) flat base, instead of a BTHP or match bullet? When shooting at subsonic speeds, bullet stability becomes a huge factor for the bullet to properly stabilize and for it to shoot well. Bullet length is a major factor in how stable it is out of the muzzle. In a given twist rate (like a 1:10″ barrel twist) and slow subsonic speeds, a shorter, flat base bullet is more stable than a longer BTHP match bullet is. The 180 grain Sierra SP flat base is a much shorter bullet than a similar weight BTHP bullet, like a 175 grain Sierra MatchKing. This allows the 180 grain SP flat base to be more stable and have the potential to be more accurate at subsonic speeds than a BTHP design. BC (ballistic coefficient) is for supersonic flight, and does not matter at subsonic speeds. Having a high BC bullet at subsonic does not benefit the shooter at all. This is why the 180 SP flat base bullets work well as subsonic round!


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