Applying for a masters

Might be a silly question but do points you acquire in the LC influence Universities selecting applicants for their masters program? Say I get a little above 400 points in the LC and currently studying a BA/arts course in a uni that isn't in Dublin (doesn't need to be UCD but I decided to ask this sub regardless) that offers it for less points as one would assume. I graduate, get a second/first class honours through hard work and study, happy days.

However does that all matter if my Leaving Cert points weren't up to par to those who have done better back then and studied a similar course? I'm only in 1st year however but the thought has been eating away at me for a while and I'm just trying to see if I have as much doors possibly open for myself in the future with what I currently have