Test Gun: Delta Elite
Barrel length: 5 inches.
Bullet: Sierra 40 cal 165gr JHP #8445 (Handload).
Test media: 10% Clear Ballistics Gel.
Distance: 10 feet.
Chronograph: Caldwell Ballistic Precision Chronograph G2.
Five shot velocity average: 1280fps
Gel Temperature 71 degrees.
This is the first of three Sierra 40 caliber bullets I’m trying in the 10mm auto format. It will be followed by other Sports Master .400 JHP’s in 150gr and 135gr. This particular bullet is listed by Sierras product code #8445. The bullet was introduced in 1992 and is suitable for both the 10mm and .40 S&W as well as the .38-40 WCF.
The powder used in this bullet, as well as the next two, was Alliant Power Pistol. I worked up to the maximum charge with data using the Sierra app on my phone. The listed velocity was 1440fps but as you can see mine come in lower.
I got a five-shot average velocity of 1280fps with a high of 1289 and a low of 1267fps. I got an extreme spreed of only 22fps.
I didn’t get a velocity off the first round, in the bare gel, but it penetrated to 17.25 inches. The expanded projectiles recovered diameter was .64 inches and the recovered weight was 133.4 grains. Round two penetrated to 17 inches and hit the block at 1260fps. It’s recovered weight was 133.8 grains and it expanded to .63 inches.
When shot through the heavy clothing covered gel block the first round also didn’t register on the chrony. It penetrated to 15 inches with a recovered weight of 160 grains. It’s recovered diameter was .68 inches. The second round smacked the block at 1266fps and penetrated to 15.5 inches. It’s recovered diameter was .69 inches and the weight was 160.4 grains.