Hi Jeeper. I have the same gun, and you do need to make sure the gun is clean and lubed. Ive got around 6-700 rounds through mine and I do still have some problems with the spend casing getting hung up and also failure to feeds with certain ammo.
It seems like jacketed ammo works better, but this could just be because the jacketed ammo I have bought is higher quality. Id stay away from any winchester bulk ammo, and would reccomend the federal bulk ammo. Also, if you don't mind paying the extra, cci mini mags work flawlessly, but will run you 30-35 per 500.
Definately break the gun down and give it a good cleaning and lubing and it should work much better.
Also, disassembly/reassembly can be somewhat frustrating, just make sure you follow the instructions exactly as they are written in the ruger manual and you will be fine. As long as you follow the manual the first few times you clean it, you will get the hang of it in no time.