Christ’s Death Actually Saves:
Because those He died for resulted in their eternal redemption, it obtained t for them Heb 9:12
12 Neither by the blood of goats and calves, but by his own blood he entered in once into the holy place, having obtained eternal redemption for us.
Thats Salvation, the word redemption here means
a ransoming, a redemption
Usage: (in the Old Testament: ransoming from imprisonment for debt, or from slavery, release from national misfortune, etc.), liberation, deliverance, release. specifically, redemption from the penalty of sin
Redemption from the penalty of sin, which penalty is eternal death as Per Rom 6:23
23 For the wages of sin is death; but the gift of God is eternal life through Jesus Christ our Lord.
So redemption from the penalty of sin is the Gift of God by and through Christ by His death having obtained eternal redemption for us, which is eternal life from eternal death, which is Salvation ! In fact eternal redemption equates to that eternal inheritance the redeemed is called to Heb 9:15
15 And for this cause he is the mediator of the new testament, that by means of death, for the redemption of the transgressions that were under the first testament, they which are called might receive the promise of eternal inheritance.
Eternal inheritance is equvilaent to that eternal life in Rom 6:23
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