I have been thinking about getting a youth-stocked shotgun for my kids. I was going to get a 20g, and let them shoot light loads, but a few of my friends have been saying to get a .410. One of the first things I noticed about this idea was that the ammo is twice as expensive as other guages.Does anybody have a source for inexpensive ammo, or does it not exist. (must I reload for yet another calilber?)