As for the heavier projectiles H4895 works well for projectiles up to around 77gr but when you go over that use varget, Varget is the best powder for projectiles heavier than 69gr bar none, also a trick with heavy projectiles in a 223 use Remington 7 1/2 primers they burn hotter
Tikka T3 1/8 twist
Norma Cases fired 4x
AR2208 23.8 grains
Primer - Remington 7.5
80 grain A max, seated 10 th off the lands.
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