Here's a 5 shot group right at MOA at 40 yards. Jumbo Dazzle converted to fixed bottle and no check valve. .187 ports, deadblow valve, 45gr Hammer from the Puncher Breaker and a twin spring debounce Hammer. 3500psi starting pressure and about 60 shots on a fill.
JSB knockouts at 890fps Avg. .217"
JSB knockouts at 890fps Avg. .217"