BRC are also good barrels. I believe they are also point cut rifling like RKS barrels.

Accuracy is affected by different amounts of gas cutting around the bullet which results in a variation of velocities between bullets plus the gas cutting will erode some of the lead causing it to stick to the barrel which we call leading.
The lead fouled barrel will affect the bullet's flight.

We use bullets wider than the barrel's groove-to-grove diameter to get a good seal which prevents the gases from cutting around the bullet.

Choking continues to produce a seal around the bullet in case any gases have started to squeeze around the bullet in travel down the barrel.

Reduced lead fouling plus consistent gas pressures results in better accuracy which is helped by choking that better ensures a well sealed bullet base as it travels the length of the barrel.

I have seen many wife spotter teams that work very well. It is simply a matter of giving it a try and other shooters will help you develop at every shoot you both attend. And as a couple you will develop long life friendships with many of the other couples who always attend the shoots. 

You both will really enjoy it.
Frequently the wife ends up wanting her own rifle too.

DEADEYE would you like to comment about how your wife shooting partnership developed.

Another vote for RKS barrels. Ron made a .40 caliber gain twist for me in SS and it chambered in .40-65. Just starting to work up a PP load and it’s showing promise, photo below. Another choice is Rice barrels in NC. (You need to Login or Register to view media files and links).
Cheers Richard