ultra33In the second half of 1997 EIDE’s 16.6 MBps limit was doubled to 33 MBps by the new Ultra ATA (also referred to as ATA-33 or Ultra DMA mode 2 protocol).Security – Browning Sporter 33 Gun Safe SP33. In terms of security, the Browning Sporter 33 Gun Safe SP33 is built extremely tough. It passed the UL RSC burglary test which ensures the safe can withstand an attack on the door