For Margaret Coleman to have married in 1853, she would have likely been more than 17 years old. This puts her latest possible DOB at 1836.
I research the Irish Family History Foundation's database. It contains 12,800,000 surviving rcds for abt 70% of Irish counties. Rcds are increasingly sparse B4 1840, rare B4 1800. Cos. Donegal and Derry were recently added to the database.
Note 1 - Without a KNOWN county, the chance of an ancestor's rcds NOT being in this database is AT LEAST 30%.
Note 2 - Only 1/2 of Co. Cork's rcds are in this database.
Note 3 - The RC church kept control over most parish rcds from Tipperary (north). These are ONLY available thru the Tipperary Family History Research center at a substantial fee (regardless of outcome).
Note 4 - Microfilms of parish church rcds are kept by the National Library of Ireland (NLI).
For Marg(aret) Coleman B 1820 +/- 16 yrs, somewhere in Ireland, with a father forenamed Pat(rick), I found 22 rcds, with just 4 in Co. Limerick: 1810, 1819, 1821, and 1824. NONE of the 4 are in Bruff RC parish. Bruff B/M rcds both began in 1781 (although there may have been many which either didn't survive, or were never entered in the registers).
Assuming the association with Bruff is correct -
For Pat(rick) Coleman M 1800-1824, Co. Limerick, I found 5 rcds: 1808, 1809, 1812, 1818, and 1824. The 1824 M rcd is in Bruff RC parish. A view of this detailed rcd SHOULD show whether the bride has the correct forename. Caution - Catherine was a widely used forename. Even with a match, it could be a false positive. If it DOES show the bride to have been a Catherine, then the rcd SHOULD also show their parents' names. Will leave the rest of the research to you.
Google the Foundation's name to lead you to this database. Register, opt to be notified as rcds are added and browse. Pls post your search results to my genforum msg.