Welocme to Ireland Reaching Out!
I checked the subscription site Roots Ireland and there were no Jeremiah Casey baptismal records around 1829 in Co. Limerick. There was a record in 1819 and then the next record was in 1858. There are a good number of RC parishes in Co. Limerick which have records starting later than 1829 so perhaps he was baptized in one of those parishes. No marriage record to a Margaret Meade either.
You may want to add Jeremiah's emigration story to our XO Chronicles site. https://irelandxo.com/ireland-xo/history-and-genealogy/ancestor-database