Software Deployment

I've just started working on software deployment and the first piece of software I've tried to deploy was Java. After testing it in a small lab environment, I recently deployed Java 6 U 26 with SCCM 2007 R3 to about 200 computers. SCCM showed a 75% success rate. On some of the system that failed I could see the installation start but never really run. I also had about another 20 systems in which SCCM said Java was installed correctly but the program did not install properly and had to be manually uninstalled and reinstalled. Are overall failure rates and problems like this high common? Is Java a more problematic piece of software to deploy than others? There was no special script added to the software package. All setting were configured in the SCCM GUI and the program was deployed with the .msi. I feel like the problems are on the client end and not the server end as much.I know this is probably pretty vague information but can someone give me a realistic expectation for software deployment.

Thanks
Ryan