Thats why CCI manufactured specifically the A17 ammo for your exact rifle... printed on the box, its 100fps faster than most of the other ammo, designed to cycle the semi auto action... I'm almost out of that brick - works great in the CZ457 - however after more testing with MANY differing weights and types, CCI, Hornady and Winchester varieties - found the Hornady XTP is about touching at 100 - so theres my next lot when the A17 runs out.
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