+P brass

[O6nop]

I have some once used 45acp brass that is headstamped with +P . Is it any different than regular brass... thicker, stronger or more durable? Or is it just the way the manufacturer identifies it?

[lrb111]

iirc, it is only so that one can discriminate between it and other loads, ie amount of powder. No other difference in the brass.

[MoJo]

I +p and +p+ is to identify the ammo when it is out of the box. I have heard +p brass is thicker but I can't prove or disprove it.

[jazr45acp]

Somewhere I read that +P and +P+ brass have thicker webbing to withstand the extra pressure. I believe Starline has an article about the subject. Later.

[Xander]

I found this on the Starline product description page:

45 Auto+P is a strengthened version of the 45 Auto with the same external dimensions. A thicker web and heavier sidewall at base strengthens the case in potentially unsupported areas. This case has approximately 2 grains less internal capacity than the standard 45 Auto.

HOWEVER...The same isn't true for their 38 or 9mm +P brass.

38 SPL+P has no difference from the standard 38 SPL, other than headstamp designation for load segregation. Due to standard case design, will handle +P pressures with no problems.

9MM+P has no difference from the standard 9mm Luger other than headstamp designation for load segregation. Due to standard case design, will handle +P pressures with no problems.

http://www.starlinebrass.com/

For what it's worth.