Question for the experts

20 shots @ 15yards. Pouring rain here today so inside is my only option.

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To keep everyone posted...I ordered, received and installed a hill 255 spring and turned hammer spring adjustment screw in 1 turn from full out and this was the result...shooting 15.89 JSBs. Ran out of these pellets until tomorrow and the gun was still on the regulator. Once I get the regulator settled in I’ll go outside and shoot for accuracy...seems solid at 15 but then again it always has. Funny thing is the old barrel would only shoot the crosmans and this barrel scatters them even at 15 yards. 
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