Miscue it matters on closed bolt guns for the fact it prevents roll outs.
I use a .691 Stiffi on my Timmy and get a +/- 3 fps over the chrono. Using Draxxus Blaze that usally measures in the .683 range.
I use a .691 Stiffi on my Timmy and get a +/- 3 fps over the chrono. Using Draxxus Blaze that usally measures in the .683 range.


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