While many cougars are killed with .22/.22 mag RFs that is after they are run up a tree and kept at bay by dogs. To handle a cougar that is hunting you is a different story.
Good point. Making the .38spl/.357mag, the .32-20, the .25-20, or your .30-30 idea an even wiser choice.
Wouldn't you think that a bullet weighing 120 grains and up, traveling between 800 and 1100 fps would be sufficient to "finish the job"?
It may not drop in its tracks like it would when hit with a full-house .30-30 or .357Mag. But I wouldn't think it necessary. All you'd need is to turn it away with a fatal shot.
This is different from wounding it with a .22rf. A .38spl through the shoulder and puncturing one lung would be sufficient for the cat to turn away, cover some ground, then die. With the same shot a .22 might merely mess up the shoulder.
This would eliminate the need for re-chambering a high powered load, then re-adjusting your sights.
Avoiding carrying a sidearm is what I'm looking for. Just simpler and less weight without it.