My JP5 loads
115 PD JHP @ 133 PF 4.6 WSF @ 1.12 OAL
124 PD JHP @ 130 PF 4.4 WSF @ 1.12 OAL
147 PD JHP @ 129 PF 3.74 WSF @ 1.12 OAL
I am going the try some CFE pistol loads next.
I am using the 60* break.
The 115 is my favorite load. I tried double taps at 15yds for each load. Paper doesn’t lie. The 147’s were softest but the 115’s were the closest groups with .17 splits.
By the way, the GMR was exactly 5 PF more than the JP5 for the same load. My GMR is a 14.5” barrel with a pin and welded comp and JP short stroke installed. Also, my friends GMR is a 16” then comp is slower than my 14.5”.
I think you will find a slower powder like WSF feels softer than a fast powder. I have tried N320, W231 and Titgrope. Caution should be used with fast powders and heavy bullets. Squibs are possible.