As for not looking to get into a gun battle or hold down the fort, do you really think the rest of us want to do that? However, that decision isn't going to be your wife's to make. She may be in a gun battle. If you are thinking she needs to be defending herself at greater than shotgun ranges, then it really sounds like you are talking about holding down the fort.
yep.
You own no weapons that will make the bad guy DRT with any assurance. You may own some powerful guns, but people survive .50 BMG wounds.
a .45-70 is just as ineffective when taken in the palm as a .223 round, and a .223 round taken to the chest would probably be just as effective in most situations as a .45-70 round in the same place.
You wife doesn't like this and isn't going to practice enough to get better with that, but she is really concerned about personal security and wants to be able to defend herself and y'all's baby at CQB to long range gun battle distances and the best gun to do it with that you own. It really sounds like y'all have a bunch of disconnects between ideals, desires, and reality.
+1. seriously, this is probably the best synthesis of what i have heard so far from the OP. I am not trying to insult the OP, but i think he needs to sit down with his wife and really discuss the realities of home defense. it is never an ideal situation. she will likely not have a lot of time to react. how fast can she shoulder this rifle? how fast can she work the lever? how does the rapidity of shots effect her ability to keep the gun on target?
if the power of the round were the only consideration, we would all have .50 BMG rifles under our pillows. that is not the reality, however. the ability to use said weapon accurately in close quarters with little time to take aim, and think about whats behind the target, all while under duress, is more important.
The .45-70 really isn't the best gun you have for the job.
i second that.
if your wife is uncomfortable with other weapons, she needs to spend more time shooting them, to increase her comfort level, because the .45-70 lever gun you guys have is not ideal.
if what you are trying to achieve is your wife being able to defend herself and the baby, in the house, during the day while you are gone, then what you need is a gun that (a) can be handled at close quarters quickly and accurately, (b) is sufficiently lethal, and (c) will not overpenetrate.
that list is in order of importance. while the .45-70 will be sufficiently lethal, you are not fighting buffalo. much smaller rounds, fired out of much smaller auto-loading guns, will also be sufficiently lethal, while also fulfilling the other two requirements.