9mm 124 grain FMJ loads with Unique

[Sieger]

Originally Posted by TheRomanhistorian

Thank you, gentlemen. This was quite fun and a foray into a new calibre for me (I scoured the range of all 9mm brass and my friend was happy to give me all of his). I'm going to work up 8 rounds at 4.6 or 4.7 grains and then 8 at 5.1.

Now the only problem is finding range time!

Hi,

I'd load one each at 4.6 ,4.7, 4.8, 4.9 to see which will activate the hold open device. After you have established your minimum, then start with loading full magazines to check for proper function.

Also, don't mix your brass, as this will affect your end results. I've used Winchester brass for the last 30 years or so, so all of my handloading data is consistent.

Unique will not burn cleanly in a 9mm, no mater how much you load. One thing to look for is whether or not the cases are sealing to the chamber walls. If the load is too light, and the case is not sealing, you will get black smokey goo on the sides of your fired cases. With proper sealing, only a hint of black smoke will cover the top of your cases, if that.

Let us know how you did at the range!


Sieger