Bullet Sizing, Live Fire Comparison: Smooth-Form vs Full-Form
I shot the Smooth-Form vs Full-Form test three days after the Smooth-Form vs Wads test. I established a baseline for Smooth-Form bullets with and without wads to see if Swinglock’s statement that a Full-Form bullet did not need a wad for superior performance was a truism. In this test I re-shot the Smooth-Form bullet without a wad again to see if velocity and precision were comparable plus it kept this comparison fair since I was collecting data for Smooth-Form vs Full-Form under the exact same conditions rather than trying to extrapolate data taken under ever so slightly different conditions.
Control Group shot with Smooth-Form sans wad:
Variable Group shot with Full-Form sans wad:
Analysis of Velocity Statistics and Precision:
Velocity:
With all else being equal the Full-Form bullet produced 24fps more velocity on average than a Smooth-Form bullet, with nearly half the Extreme Spread, and nearly half the Standard Deviation.
Comparing the Smooth-Form without wad in Test 1 to Test 2 velocities were nearly identical. The differences in high velocity were 6fps, low velocity 5fps, average velocity 4fps, extreme spread 1fps, and standard deviation 1fps.
Precision:
With all else being equal the Full-Form bullet produced 50.9% better precision than the Smooth-Form bullet.
While this is more accuracy than precision, the point of impact on this round of Smooth-Form, No Wad is lower than the last test with the same load. All other groups, including Full-Form, No Wad, had nearly the same point of impact which is in the 8-ring between 12 and 1 o’clock.
Conclusion:
With all else equal, there is a discernible performance increase with a Full-Form bullet over a Smooth-Form bullet.
H322 in combination with this bullet shows a high potential for predictable and consistent velocity as well as precision.