Buy a Savage 210 for 400bucks, throw away barrel and plastic stock,get a heavy 12ga barrel Min diameter 1.5 in.
Get hevy stock with big butt to put wt in,
lenthen port, change bolt stop ,and so on.
Now if you want real African rifle quality you can
do one like Rob did, in this picture,with big Borchardt
falling block action.Ed
