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What is your barrel length/manufacturer?
Using .223 or .221 cases?
I get about 2100 fps w/17.7g H110 & 125g Sierras out of my 16" M1S.
@18.4g of H110 I got 2184 + HIGH pressure signs.
I have some .308 110g M1 carbine bullets i'll try to load for velocity comparison.
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