Excessive penetration is the LAST thing you want. NATO hardball will penetrate, but it's about the worst self defense ammo you could choose.
History fails to record a single precedent in which nations subject to moral decay have not passed into political and economic decline. There has been either a spiritual awakening to overcome the moral lapse, or a progressive deterioration leading to ultimate national disaster.
If you think a strong military is expensive, think about what a weak one would cost