Some stovepipes on first 9mm reloads

[Lord snow]

So I shot the first thirty 9mm reloads I made up today and six of them stovepiped.

All went bang, seemed reasonably accurate, etc.

Is it more likely that a.) the charge is too light (I'm using 6.5gr Accurate # 7 w/ 115gr Berry's RN), b.) I need to crimp (I did not, but I do have a crimp die) c.) some combination of these or d.) something else?

My initial thought was that either the charge was too light, causing the slide not to fully cycle, and/or the lack of crimp delayed extraction causing it to get stuck.

 

[97 winchester]

Many possible reasons. You are right that light load could very well be the issue. I personally doubt that lack of crimp is the issue. I also do not crimp many loads. Crimp can cause issues
as well as prevent. If I have good bullet tension I keep crimp very light to none.
I would look to charge weight first.
Have you had feed/extraction issue before?
If not , again look at charge weight.
If you believe you want a crimp I would use taper crimp die not roll crimp . Just my 2 cents. I haven't loaded millions of rounds but it's been a few.
Most failures like this were due to light load or weak springs.

 

[jeep78]

If you are not using a chronograph, borrow or buy one.

You have no way to know what your loads are doing without one.

 

[Lord snow]

If you are not using a chronograph, borrow or buy one.

You have no way to know what your loads are doing without one.

Any recommendation for a chronograph ?

 

[jeep78]

Any recommendation for a chronograph ?

There are 2 types. Optical or radar based.

Both have their followers and advantages. Best to try each and see what works for you.

 

[97 winchester]

If you are not using a chronograph, borrow or buy one.

You have no way to know what your loads are doing without one.

I respectfully disagree. You don't absolutely need a chrony.
I loaded privately and commercially for decades w/o a chrony.
You can develop and diagnose load issues to get great dependable, accurate effective loads without knowing exactly the speed of a specific load.
If you borrow one fine, but it is not a critical need to produce quality reloads.

 

[Clarke123]

https://www.thehighroad.org/index.php?threads/9mm-failure-to-eject.723323/

 

[1006]

Add powder.

 

[1006]

 

[1006]

Aa7 needs a crimp. If you want to load light or with a super light crimp, use a fast powder.