Reply To: FX Impact Velocity Data

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I have tested the 177 royale with jsb 8.4 and 10.3 on medium and high power. The heavies are extremely accurate at 775 (medium power) and at high power in 2 guns. I can’t remember the high power speed.  .33-.6″ 5 shot 50 yard groups are the norm. 
The 8.4s are less accurate but partly because they sometimes bind a bit in the magazine. When the band they throw fliers out 2 inches. The 10.3 doesn’t bind.