I remember that round, very well.
My father would take me with him when he went up into central California
to a deer club located up in the rolling hills near St Helena, that belonged
to an Italian family, that worked in the wine industry, there.
The old Italian hunters had very old semi-autos, that shot various 30 & 32 caliber hunting ammo
used for the small Black tail deer in the area.
Your 303 Savage was one of the rounds that was used as well as the 30 Remington.
With all the bushes and trees in the area, these loads were perfect, for the fast shooting
needed to score a hit or a fast follow up shot, before the deer could disappear in the cover.
While my father went hunting, I got to fish the Bass pond that they had,
behind the cabin, to see if a bass or panfish would grab my offering.
Life was good, back then.