I have a 6-pin RUKO lock with only spools in it. It has been impossible for me to open with my snap-gun; so, I figured I would try to remove some pins. First I tried with a single pin, it worked like a charm. Then I put in the second which has the deepest key-pin possible (meaning that it is set by default), and it was again impossible to pick

Any tips on how to beat those pins when using a snap-gun?
Any help is appreciated - thanks!