9mm luger case length

[tggdeer]

I have the lyman handbook 49 edition. It calls for the 9mm luger case length to be .754 . I have remington and winchester brass. They have been fired once. I bought these new, and shot them once.Now, the question is, why do they all measure short? All of them measure .744-.746 .I even checked a new case and it measured short to.If, I seat the bullet to match the recomended OAL ,"which I did", is the bullet seated deep enough into the case.I shot some like this and the y were fine. Some one please explain this to me.

 

[RustyFN]

Max case lenght is .754, you need to trim the brass when it gets longer than that. Don't worry it never will. Just load and shoot until the neck cracks, primer pockets get loose or you lose them. Some people like to trim them but you should never have to trim any straight wall pistol cases.
Rusty

 

[rfwobbly]

Rusty told you right. Remember these are more properly known as 9x19. 19mm is the case length, which equals 0.748 inches. So that's the optimal length, but I too see most of my cases running about .746 in.

Every once in awhile I'll see a case come in short at something below .744 or with a loose primer pocket, then I toss them. Otherwise I just load them all.

 

[Walkalong]

I have never measured or trimmed a 9MM case. I do use a case gauge to check all my sized 9MM brass these days since I have a tight chambered 9MM now. I have never trimmed any auto cases. If the case is over max length the gauge would show it because it would stick out, but too short you would just have to eyeball.

If they fit in the gauge after sizing, and the primer pocket is still tight when I prime it, I load it.

 

[tggdeer]

Thanks for the info..

I think I worry too much..

 

[highlander 5]

Cases tend to shrink some after being fired. They will return to their normal length when resized.