9mm reload issues help

[leviathanxx]

Looking for advice as I am still fairly new to reloading. I recently made a batch of 9mm 124gr fmj with 4.3-4.5 gr of silhouette powder at COAL of 1.14-1.15 as I was scared to do the recommended COAL of .90 per the sierra reloading book.

The rounds cycle decently through my hk usp (every 1/7 does not eject the cartridge completely and gets stuck in the slide) whilst my Beretta won't eject the cartridge at all.

The rounds all fit perfectly in the saami spec bullet guage I have from Whidden in which all the bullets fit perfectly. My current xl750 consists of lee deluxe trim/deprimer, Dillon powder dispenser, daa powder check, lee bullet seater, lee crimper.

I am sure someone can easily point out an issue I have made but I am not sure what I need to change. Do I need to COAL to .900 per Sierra loading data?

[BajaJames83]

if the slide isnt moving back enough to reliably eject the fired case it would seem your load is weak. Thats probably why they had that shorter OAL as it would increase pressures and velocity more.

[J-cat]

The max load for this combo is 6.1 grains. Why are you running 4.5? I wonder it’s unreliable.

[leviathanxx]

J cat,

For the 124 gr I see a low of 4.0 and the highest (high pressure load) at 5.2. According to the Sierra loading manual

[ironhorse1]

Checking the powder load data I would say that you are at the very light end for silhouette powder.

Add to that your OAL is on the long side resulting in FTE on the Beretta.

Do not load to .9" as the pressure will really increase a lot!

Try loads @ 1.20" for the best results. Look here for better load data.

https://www.ramshot.com/load-data/

Good luck!

irh

[mofo1111]

Western Powder calls for 4.7-5.5 grains at a COAL of 1.100" for 124 gr military FMJ.
5.1-5.8 grains for 124 Berry's FMJ bullet at COAL of 1.160".

The only other recommendations that I can think of is to make sure the barrel is clean, and full length resize the brass.

I can't remember ever seeing a COAL of less than 1.000" for 9mm in load data.

[leviathanxx]

Sorry I put .90 instead of 1.090 my mistake

[bohoki]

if you want a stingy powder use bullseye or red dot 4 grains will cycle anything

[J-cat]

J cat,

For the 124 gr I see a low of 4.0 and the highest (high pressure load) at 5.2. According to the Sierra loading manual