Just remember that not all blanks are created equal. Your standard US or CDN surplus military blanks are the weakest and will probably have underwhelming results but that all depends on the size of your course.
Blanks made by S&B are somewhat hotter.
If your lucky enough to find any .223 blanks made by Barnaul (though doubtful because I think I bought all that came into the country)you will notice that they are much hotter and your golf ball really flies.
Use caution with .223 grenade launching blanks or film industry blanks, in all likelihood you will probably never find your ball again.