I decided as the off season was approaching to do some load testing. I realize the felt recoil is a personal preference so I am just stating my preferences here for the benefit of discussion.
I'm running a custom JPL 40 with a Bedell comp cut down to 5 ports. In my other Open 40 I was running 8.5gr of Longshot with the 135gr Rainier/Nosler at 1.155 OAL. In my back up gun it was running about 177pf and that is the minimum load for Longshot. I shot that for a number of years and it was pretty good out of that gun (Tony Kidd built, custom Tony Kidd comp, Schuemann barrel).
The same load is running 183pf with the JPL gun and a KKM barrel. When I started shooting open in 2004 I started with a shorty 9 major and hated it. I switched to a 40 Open in 2011 and tried numerous powders and bullet weights before I settled on Longshot.
With the higher power factor and more modern powders, I decided to give it a go again. I'm using a baseline of 174pf for all powders and all are loaded to 1.155 OAL. I'm trying the following powders:
Hodgdon HS-6
Winchester Auto Comp
Ramshot Silhouette
Winchester 572
I'm not trying any Viht powders, as I tried several years ago and they are ridiculously expensive.
So far, I have shot HS-6, Auto Comp and Silhouette side by side with Longshot. I preferred Auto Comp and Silhouette over Longshot but Longshot over HS-6. I'll be testing the 572 later this week and shooting Auto Comp, Silhouette and 572 side by side.