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Since they are Sierra bullets, I suggest you check with the Sierra loading manual. They have done most of the work for you with THEIR bullets.
Sierra manual: 223 remington (AR 15) 69gr Matchking HPBT.
C.O.A.L. 2.260"
Powder Min. Max. Velocity
VihtN133 21.1 21.8 2500-2700
IMR4891 18.8 20.3 2500-2750
X-Term 21.9 23.3 2600-2800
AA2230 21.9 23.5 2500-2700
748 23.7 25.8 2500-2800
AA2460 22.9 24.5 2600-2800
H335 21.2 23.8 2500-2700
TAC 22.1 24.2 2500-2800
IMR4895 22.9 24.5 2400-2700
VihtN135 21.7 22.5 2500-2600
Varget 23.3 26.1 2500-2850
IMR4064 23.3 24.1 2500-2600
AA2520 23.1 25.5 2600-2900
IMR4320 24.0 25.4 2500-2700
VhtN140 23.1 25.1 2500-2750
RE15 23.3 25.7 2500-2750
Their accuracy load. Varget 25.3 2750
They also have another listing for bolt guns.
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No such thing as a stupid question. What is stupid is not asking it.
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