pheeew a Grizz with a handgun --- maybe a Black bear,I've had to dump only 1 Grizz at close quartersin48 years in the bush and that was with a 45-70 Marlin G lever gun,all 4 rounds in the boiler room starting at 25yards and the thing blew past me dead on the run like a school bus.You are a brave person,practice straight fast shooting and try to factor in the panic part when something with a head the size of 16 gallon garbage can is comin at you at 20 miles an hour --- good luck