In theory, the 18" will be more accurate being stainless and being 1/8 twist means your able to stabilize heavier bullets, then you can use 77gr sierra match king rounds. The 20" will gain at a a guess 80fps extra over the 18"
In theory, the 18" will be more accurate being stainless and being 1/8 twist means your able to stabilize heavier bullets, then you can use 77gr sierra match king rounds. The 20" will gain at a a guess 80fps extra over the 18"
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