In regard to scopes for the girls. I started the boys I have with scopes from Leopold in the lower power ranges like 2 -9 variables and changed them over to sights after that. Whichever you wish there. You could use a lesser Burris or Athlon optic as well.
For you the Bergara B14r and a Vortex Strike Eagle would work great. With a 30 moa scope rail. Ammunition is a little difficult at this moment but ordering on line is the way to go now. With your rifle I would be working with SK or Lapua to start. Not much left but you can try these.
For you and your rifle I would look at the SK Biathlon Sport from Creedmoore Sports. For the girls I would look at Eley Semi-Auto Benchrest Outlaw from Killough Shooting Sports. The ammunition for the girls is inexpensive, good and accurate for most firearms. You may wish to use it in your rifle as a practice ammunition as well.
You should take a look at this as well. A lot of information here, 2 1/2 years, just for ammunition. Not from my self this is another gentleman's work.
https://www.rimfirecentral.com/forums/showthread.php?p=11073821#post11073821
https://www.creedmoorsports.com/category/rimfire-ammunition
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