Here is one for ya.
After reloading for a couple years I decided to "experiment" and put spritzer points on my .30.30 rounds. Wanted to see if I could increase the old guns range (Marlin 336c).
WAIT I only loaded one at a time directly into chamber!
Well after shooting a few and finding minimal real improvement in velocity or range, decided "oh well {shrug} Worth a try"
Then on a hunting trip saw a chance to bag a Coyote and threw one of these in the chamber, but alas the dog disappeared before I could shoot.
Then found in trying to extract the unfired round it was to long to clear the extraction port........ so I had to fire it off in order to chamber a regular hunting round.
Guess it shows not to load bullets not designed for your rifle.