i like the idea of the .219 zipper.... and i own a .225 win on a m70... i shoot the hornady 62 gr hpbt, at around 3250 fps... into a 1/2 group at 100 yds.... i've taken deer, texas hogs. jackrabbits.... all 1 shot kills....the .219 would be very easy to load for.. 30/30 brass is plentiful