WHen it comes to 22LR, I always hear "use solids for better penetration" or "use hollowpoints for better expansion". As a kid, I shot .22 LR into everything and anything I safely could, and I found repeatedly the things I was told and that people seemed to believe without question simply were not true. Shooting 2 x4's lined up, I realized that the hollowpoints actually held together like a bullet should so, and actually mushroomed, whereas so-called "solids" had a more of a "splatter" effect which basically flattened the bullet and caused it to break apart, failing both expansion and penetration requirements. The only think I care to shoot with "solids" is paper and pop cans. For basically every other use of a .22, I've found hollowpoints to be superior and if forced to use a 22 for defense, I'd again go to HPs