Federal Premium Gold Medal, .223 Rem, BTHP, 77 Grain, 20 Rounds. Buyer's Club $37.99 Non-Member $39.99. Item not currently available for order . 4.5 out of 5 star ...
After trying 4 different powders with 75 gr Hornady, I tried 77SMKs. The best I got out of the 75gr was a 1 1/4" 5 shot group with 8208xbr. Working to the 23.1grains gave me a 3/4" 5 shot group @2630 with an extreme spread of 15.
IMI 5.56x45 77 grain ammo offers excellent accuracy with effective terminal performance and a price that is very affordable for a product of its class. The brass is annealed, the primers are boxer type, non-corrosive and sealed and crimped. Quality of this ammunition is excellent and the brass is good for reloading.
SIERRA 77 gr. HPBT MK w/c loaded with X-Terminator and a CCI-400. Winchester cases: average velocity 2641 FPS, ES 111 and an SD of 29 for 14 rounds. The next loads with this bullet will be charged with TAC. The load I used came from the Lyman 49th .223 data which was .5 grs. higher than Ramshot shows for 5.56 NATO with the same bullet.
Mar 19, 2020 · I loaded IMR4166 Enduron powder and 69 grain Sierra SMK #1380 and Sierra 69 gr Tipped Match King #7169 bullets with the seating depths for the 77 grain bullets to achieve the a jump to the rifling – 0.030 to 0.020 – and then adjusted the seating depth by less than 0.005 thousandths to achieve the desired exit times to accommodate variations ...
Sierra Bullets has been producing some of the most accurate bullets in the world since 1947. Midsouth Shooters has been proud to offer a full selection of Sierra reloading bullets for over 30 years. We now carry every bullet that they offer for resale. If you find one that we don't carry, tell us, we'll add it.
May 31, 2016 · This upper has a Centurion Arms barrel that shoots the 77grain SMK at just over 1" regularly, and that started the day with a 7/8" 6 shot warm up group with 7-cent Hornady FMJ reloads. After the trouble started I switched back to 77 grain SMK load and the 12.5" barrel again printed a group just over an inch.