Bottom Line: …still evaluating… the loads I’ve tried so far didn’t give claimed performance with jacketed bullets, but did with lead (at unknown pressures).
- Low Flash (lives up to manufacturer’s claims)
- Claims high performance, less jacketed fouling
- Gritty feel when metering
- Sparse load data
Redding 3BR Pistol Insert
Grains Thrown ≈ 0.172 × pistol_insert_number + 0.4
|Pistol Insert #
||10x Throws (Grains)
Advantage Arms 1911 Target Conversion Kit
|CCI 40grain CPRN “AR Tactical”
||About 20% of the shots didn’t register on the LabRadar. Manually removed outliers, did a linear regression, and found -2.81 fps/yard
All loads use 8.6 grains of Power Pistol and a Remington 2 1/2 primer. Unfortunately brass was not identical, and the powder measure may have dispensed ±0.1 grains.
Results from 6-shot string measured with a Lab Radar gen 1 at Reeds Indoor Range in Santa Clara. All velocity numbers are in feet / second, all distances are in yards, all weights in grains.
Firearm: Ruger Blackhawk, 5.5″ Barrel
*Approx Drag: I plotted the velocity-measurements from a single shot in Excel, discarded obvious outliers by hand, then did a linear fit to velocity = v0 – drag•distance. Real-world drag is a function of velocity^2, and my methodology wasn’t rigorous, but this was an easy way to get an comparable number.
Conclusions: I’m surprised there’s so little difference between the 230 and 255 grain bullets. It’s less than an 11% difference in weight, but it’s still a difference, and yet the velocity is nearly identical. I’m not sure if the difference in StdDev and Spread is statistically significant. I need to run this experiment again with identical brass.
The DEWC was seated much deeper, and performed better. Looks like PowerPistol likes a bit more pressure. Or at least less space.
The Lyman #454190 lives up to the high ballistic-coefficient shown in the manuals.
I should gather seating depth numbers, and guesstimate pressure in Quickload. But it looks like this is a good example of seating depth mattering much more than weight.