I purchased the gauge block from Archery Air Guns in Canada for the pp750 and installed it on my Noto's. My fps went from 740+ to over 800+ fps. with Crosman 14.3 pellets. I'm happy with that! My Noto's two have the eBay drop block with a 3L bottle on it and my fps is 738, ending down to 726 fps, 50 shots. I fill only 3200 psi and shoot down to 2200 psi. My extreme spread is very low from 5 to 8 on the last 10
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