The 222 Magazine should work. However you can probably just reshape the one thats in it now. Try Gun Part Corp for a magazine. The 788 was a good shooting rifle. The weak point was the bolt handle sometimes came off as they were soldered on. I had several of them and the handle came off one of mine. Remington said it couldn't be fixed but I found a gunsmith who didn't agree and he repaired it for me. Make sure that the magazine spring is not in back-words.