I am not a fan of lil gun for revolver calibers. First , the statement that it has "low chamber pressures" is bull. It has a very flat pressure curve, and while the PEAK pressure is somewhat lower than typical, the AVERAGE pressure and TEMPERATURE are HIGHER than typical. To get high MV, the integrated total work under the pressure curve must be high. There is no magic way to get high MV without more heat and total pressure.
So while lil gun is less likely to BLOW UP your gun it is MORE likely to BURN it up.

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Science plus Art