6 mm Remington

[30338]

I'd look at brass options in Alpha Munitions and Lapua for 6mm or 22 cal cartridges. Choose the one you want, order a small contour barrel with 7.5 twist and carry on.

 

[nm.otter]

If you decide to rebarrel, 6mm Creedmoor has a bright future for your kids -- factory ammo with genuine long range performance.