Quickload predicts...
6XC
18" barrel
105 Amax
2.78" coal
Varget, 38gr, 92% case fill, 60,600 psi, 2,807 fps.
IMR-8208xbr, 36.3gr, 85% case fill, 60,500 psi, 2,790 fps.
H-4530, 42gr, 100% case fill, 60,900 psi, 2,830 fps.
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I would exclude 8208xbr because 85% case fill is not optimal, but could work if needed.
Varget looks good enough and certainly close in velocity with H-4350 in the 18" barrel.
6XC
18" barrel
105 Amax
2.78" coal
Varget, 38gr, 92% case fill, 60,600 psi, 2,807 fps.
IMR-8208xbr, 36.3gr, 85% case fill, 60,500 psi, 2,790 fps.
H-4530, 42gr, 100% case fill, 60,900 psi, 2,830 fps.
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I would exclude 8208xbr because 85% case fill is not optimal, but could work if needed.
Varget looks good enough and certainly close in velocity with H-4350 in the 18" barrel.