Coralstown/Kinnegad became the first club to reach the quarter-finals with a hard-earned draw (0-11 apiece) against Killucan on Friday evening in Mullingar.
It needed a late free by Shane Fleming to earn Peter Brady's charges a share of the points, having trailed Killucan by 0-7 to 0-4 at half-time.
As expected, both of last year's finalists, Garrycastle and St Loman's, Mullingar, also made the last eight by recording their second consecutive wins on Saturday.
In Athlone, champions Garrycastle proved too strong for newly-promoted Caulry.
The holders led by 2-7 to 0-4 at half-time and went on to win by 5-11 to 0-5, goals coming from James Dolan, Conor Cosgrove, Tom O'Halloran and Jason Nugent (two).
Meanwhile, in Mullingar, St Loman's comfortably shook off the challenge of Shandonagh by 0-17 to 1-8. Selector Ciaran Kilmurray wore the bainisteoir's bib for St Loman's, with manager Declan Kelly in lockdown in his native Offaly.
They led 0-8 to 0-7 at the break, with all the scores coming from John Heslin (who finished with a dozen points).
Shandonagh's Mickey Boyle was sin-binned shortly before the break and was red-carded shortly after coming back on. His colleague Brian Kavanagh netted a late penalty, but St Loman's always looked the more likely winners.
Last night in Mullingar, Rosemount became the fourth team to make the quarter-finals after a comfortable victory over a very disappointing side from The Downs, Frankie Dolan's charges winning in the end by seven points (2-10 to 0-9).
The winners dominated the first half and were full value for their 12-point lead at the interval (2-7 to 0-1), the goals expertly finished by Theo Watts and Sean Pettit.