9mm Bullets for Reloading

[tgwillard]

I see that 9mm bullets are available in .355 and .356 diameters and are both listed in reloading tables. Why the difference in diameters?

 

[tgwillard]

I see that 9mm bullets are available in .355 and .356 diameters and are both listed in reloading tables. Why the difference in diameters?

 

[epj]

There is a lot of variation in bore diameter in various 9mm pistols, especially ones of foreign manufacture. However, you are probably looking at jacketed (.355) vs cast (.356)bullets. .355 is the "standard" diameter for 9mm bullets. Generally speaking, cast bullets will be sized 1/1000th larger than the jacketed version. If you're seeing .356 jacketed bullets, it's for guns with a larger groove diameter, or for use in .38 Super.