Let her choose.
Call up your shooting buddies and have them come out to the range with their revolvers. They should let you know the caliber so you can pick up one type of ammo to test in all of them. The results will be more consistent that way. Get something like lead semi-wadcutters for her to try out. Stay away from the magnums unless she wants to compare them to a .38. If the calibers vary, try to get comparative ammo (no magnums or +p loads) that is moderate in recoil.
Let her judge on the basis of comfort, ease of operations, trigger pull, accuracy and most important of all, confidence.
If your buddies won't share (what sort of buddies are they then?), then find a range that rents some guns and take your wife there. Try before you buy.
Call up your shooting buddies and have them come out to the range with their revolvers. They should let you know the caliber so you can pick up one type of ammo to test in all of them. The results will be more consistent that way. Get something like lead semi-wadcutters for her to try out. Stay away from the magnums unless she wants to compare them to a .38. If the calibers vary, try to get comparative ammo (no magnums or +p loads) that is moderate in recoil.
Let her judge on the basis of comfort, ease of operations, trigger pull, accuracy and most important of all, confidence.
If your buddies won't share (what sort of buddies are they then?), then find a range that rents some guns and take your wife there. Try before you buy.