Sounds like your spring is getting weak, they came new with a little collar to put on between the adjuster and the spring. you can see it here http://www.viewloaderparts.com/downloadFiles/brass_eagle_marauder.gif
viewloaderparts.com carries the spacer here for $1.00 plus shipping.
137631-000 Spacer [AV1,GN1,MAR,RAP,MEG]
viewloaderparts.com carries the spacer here for $1.00 plus shipping.
137631-000 Spacer [AV1,GN1,MAR,RAP,MEG]