Out of my M1S upper w16" barrel:
Rem 150g PSPs, w/8.3g H110, Win .223 brass, WSR primer & COAL 2.138" on 66* day gave me 1058-1077 fps range w/avg @ 1066.6 & 0.648" group @ 100 yards.
I adjusted scope +13" up from my regular 125g supersonic POI & they were all in the bullseye.
W/7.62 SD VERY quiet & VERY accurate!