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Discussion Starter · #1 ·
On Starline's website, they have listed 9mm and 9mm +P..... .38sp and .38sp +P...etc..... Are the +P really heavy duty....in other words, I have about 2000 new 9mm brass...I'm assuming I should not use +P data to load these....if so, I'm sure I can come up with a good load for something like a Hornady XTP.....
 

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I have seen +P brass but always figured that was another way to increase margin for the supplier. Will they last longer with +P loads maybe but I always inspect the case before I reload and haven't had issues.

For any handgun the question I would have is: Is the firearm +P rated.
 

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ya got me courious so i went to the starline site and did some lookin'. under the product description catagory i did not see 9+ as a headiner but did see 45acp+-------clicked on it and found that both the 9mm+p and the 45acp+p brass descriptions.

There is a difference in the 45 but no difference in the 9mm construction---here are some copy and pastes from the site

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.
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
for tickles and grins, i also checked on the good ole' 38 spl
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
so it looks like the 45acp+p stuff is built stronger and there is a real difference there, while the 38 and 9mm +p stamped stuff is just a designation on the brass to seperate your loads by visual inspection as there is no difference in case design.............
 

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Discussion Starter · #4 ·
Thanks, Deputy....don't know why I never thought of looking on Starline's website....At least now I know....Thanks again.....
 

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The thicker case is stronger and holds less powder. I realize that a thicker case will have greater pressure due to less room and there is plenty of room in the case for powder but it just struck me funny.

The only cases I load +P are 38 SPl. I don't have loads for 45 ACP +P but with a 230 gr bullet at 900 FPS thats enough for me.
 

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Off the top of my head I would have said it was just the head stamp to let you easily ID heavier loaded cartridges, but been wrong on the 45acp.
Wouldn't matter to me as I use both types and load for what I need, just mark the box clearly.
Thanks to Deputy we got the straight skinny.
 
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