Here’s the finished 9mm Major top end that John from http://www.jplprecision.com built for me.
Just took some different 9mm Major recipes with me to test. They were :
- RP 9mm Once Fired Brass
- 124gr Montana Gold CMJ
- Winchester Small Rifle Primer
- 8.5 – 9.0 gr of Hodgdon HS-6 Powder
- OAL : 1.165
I started with a 8.5gr load and worked up to 9.0 but we didn’t need it. If you look at the chart below, even 8.5gr of HS-6 was wayyy over the required powerfactor.
John’s load is a 7.6gr Silhouette behind a 121gr IFP round.
|8.5gr HS6||8.6gr HS6||John’s|
The new KKM barrel is tight and very fast. Looks like I have to dumb down my loads to probably 8.2 or 8.3 gr of HS-6 powder.