ruger mini-14 tactical

Ok so my Mini 14 Tactical is almost done and boy I think its looking good. I have replaced the stock with the Hogue Overmolded Ghillie Tan stock and also duracoated the rifle in coyote brown(except sights, bolt, and operating handle). Now im on to sighting options and I had a Bushnell 4-12x40mm...

now that factory mags can be had.... which is better for situations concerning defense? 223 vs 762 ? .. what about the firing pin?

Hello, Yesterday was a big day....I bought my first Ruger Mini-14. It is a Tactical in .223, blue with a 20 rd. magazine. I just ordered a 1000 rds. of ammo today online and also (2) Ruger factory 30rd. magazines. I am very excited about shooting it.....that will be next week-end. I think...