Reloading Blues

[lordpaxman]

Bullets that is. I received a shipment of various 9mm sized to .356. All were loaded at 1.120 COL, atop Sport Pistol and a CCI 500 in Blazer brass. It was an abbreviated 5 shot load development with the goal to make comfortable minor (130ish). The secondary goal was to see if the Mantis X recoilometer showed any appreciable difference in these loads fired from a P320 X5 Legion. My normal go to load is a147 gr RN at 3.0gr ASP. While 5 shot groups aren’t statistically significant, I’ve done enough ASP work to know it meters really well and produces low SDs so I’m comfortable using these as a start point. Precision on these groups were all in the 1” - 1.5” at 10yards, benchrest.
The following is where I ended up, posting these as a comfortable minor load, should I need to use these in the future. I really want that chrono stage to be a gimme.

125gr RN, 3.7gr ASP, 1.120”, 129PF
125gr TC, 3.7gr ASP, 1.120”, 131PF
135gr TC, 3.4gr ASP, 1.120”, 132PF
147gr FP, 3.0gr ASP, 1.120”, 128PF
147gr RN, 3.0gr ASP, 1.120”, 132PF

I’m still trying to make sense of the recoilometer data, but thought I’d post this in case anyone is in the run and gun game and needed a starting point. As a side note, Alliant has coated data for 124 and 147 but not 135 so I split the difference. I also think I’m at or below what would be considered a start charge which in their world is .9*Max.
When the shortage abates I plan to do development for Target, Titegroup, N320 and W244. Hope this helps and good luck.

 

[Blue68f100]

I have the Mantis X and have been using it. I have not looked at the recoil data. What you want in the recoil plot, is for the gun not to dip down. Which makes for a faster follow up shot. So if the gun is dipping down you normally go a lighter recoil spring.