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360 Posts
I'm not sure why this is, but for now the heavier bullets work great, I being heavier they're more stabolized as they leave the barrel, just a thought, and yes the groups are awesome..Funny, I've noticed the same thing in my 19.5. With 150gr HSTs I shot a sub 1" group @15Y a week or so ago. My 115gr FMJ BB groups were a pathetic 2.5 to 3.5 inches @15Y.