close your door slowly and look and see how and where it is contacting the striker bolt. then, when you loosen the screws for the striker bolt, it will slide around a little, front to back and up and down. just move it a fraction in the direction you think it needs to go, then tighten it back down. close your door slowly and see how it mates up to it. then close it and see if it is any tighter. like i said, trial and error. took me about a half hour to get it where i wanted it. i had all new rubber door surrounds put on and they were bigger due to the old ones being totally collapsed and useless. didn't take long to figure out i needed to adjust the doors so they would close more easily.
good luck with this.