I have a Mossberg 505 Youth (12" LOP, 21" barrel) Pump Shotgun in 410. and a Remington 870 Jr. 20 ga. (12" LOP, 21" barrel). My wife didn't really like the recoil of the 20 ga. last time she shot it. However next time we go to the range we're going to bring both shotguns. If she can handle 10 to 15 practice rounds though the 20 ga., I'll work with her every few weeks so she can operate it in her sleep. However, if she can't take 10 to 15 round of 20 ga., I'd like to woork with her with the 410. How effective can a 410 be for a inside the house home defense shotgun gun with a maximun range of 30 FEET or so? What type of loads should I be looking to get for the 410? Can a 410 shotgun with a 21" barrel be effective within the short range she'll need to use it in? Thanks, NYH1!