Rules of a gun fight:
1) Gun beats no gun - buy what you will actually carry
2) Hit beats miss - a .22 that hits is worth far more than the .44 mag that misses
3) fast beats slow - He who shoots first, often shoots last
4) Big holes beats fast bullets - get the largest caliber you can control (see #3). With in the same caliber, go with the faster bullet (see #3)
5) many holes beat one hole - it the situation called for a shot, two is better than one.
Slow hits beat fast misses. Concentrate on aiming your gun and not just firing rounds.