the 22 Savage High- power:
Designed by Charles Newton and intruded by savage in it's model 99 leaver action about 1912. it is known in Europe as the 5.6x52R.
This round has been obsolete in the us since the 1930's
it uses a bullet of 0.228" the savage high power is based in the25-35 case necked down.
http://www.qual-cart.com/index.html this company list them as well as the 5.6x52R for $26.97 per 20
for pwders you can try
IMR 4895
IMR 3031
H380
RL-7
IMR4198
with bullet weights from 55 gr to71 gr.
Cartridges of the world 10 Th edition page 108 :grin: