You can, and we've done it with off-duty carry guns at work during qualifications, since we only carry .40S&W dummy rounds and most guys carry 9mm or .380 off-duty guns. It won't work as well, but you'll still get plenty of practice at clearing malfunctions if it hangs up and stovepipes. One thing you can do is take a pliers and crimp down the case opening to somewhat of a point so that it feeds into the chamber, if that description makes sense.
DinanTronics Stage 1 F30 328i M Sport
Dinan 20" Black Performance Wheels
Gunfighter Training Development and Evaluation
AR15/AR10 Armorer/Advanced Armorer
Gunfighter Training YouTube Channel