I sent my 5.5" Bisley 45 colt in to Ruger to have them look at it. It was shooting very high and I had no more sight adjustment. Anyways I got it back today. The note that they sent says, "replaced mainspring, repaired throat". I had a custom mainspring in it as well as trigger spring. Basically they put factory on. So my first question is will this change trigger pull or just hammer pull? My second question is what throat? It doesn't say cylinder throats, it just says repair throat.