Sorry to disgree, but you also need luck and a hunting area that guarantees you plenty of broadside lung shots. In many parts of the world your technique would not work at all because to wait for the perfect broadside shot would mean passing up 90% of the shootable deer you see. If you tried your load on an angling shot from behind the last rib it would likely not reach the vitals, leaving a badly wounded deer to die a slow, agonizing death. No honorable hunter wants that to happen.
From my own extensive experiences with many different .25s, I would recommend that 95% of .25-caliber hunters use hunting bullets of 100 grains or heavier in both cartridges if big game is the target. Using a load which limits your shot options is not the best way to maximize your chances to fill your tags.
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