proper use of spacers

[Dzerzhinsky]

i really dont know how to use the little bastards, could someone either tell me how or direct me to a place i can find out. I heard they can be used to lighten trigger pull, is that true because my trigger pull is super heavy

[Butterfingers]

They are not usually used to lighten the trigger pull. They are used to correct problems like bolt stick or leaking down the barrel.

The way you use them is you use the largest spacer possible without getting leaking down the barrel or "prefiring" leaking before the gun fires on its trigger stroke.