Brass Fetcher
Member
I have just finished testing the CZ-52 in ballistic gelatin, using three weights of the Hornady XTP JHP.
Firearm : CZ-52 with 4.6" barrel length
Ammunition : Three handloaded Hornady XTP bullets of various weights, loaded to tabulated maximum pressure
Block calibration : 590 ft/sec and 8.7cm penetration
Shot 1 - Hornady 85gr XTP, resized to 0.309" diameter. Impacted at unknown velocity (chronograph read 3313 ft/sec). Penetrated to 11.5" and was recovered at 0.510" average diameter. Track outlined in blue.
Shot 2 - Hornady 90gr XTP. Impacted at 1512 ft/sec and penetrated to 12.3". Bullet was recovered at 0.498" average diameter. Track outlined in magenta.
Shot 3 - Hornady 100gr XTP. Impacted at 1551 ft/sec and penetrated to 13.9". Bullet was recovered at 0.501" average diameter. Track outlined in purple.
The 85gr and 100gr Hornady XTPs were actually a little bit too large in diameter for this usage (0.312") - IE, most bullets I've seen for the 7.62x25mm were 0.308" in diameter. So, those bullets were trimmed down using the Lee lead bullet sizing die, in 0.308" diameter.
Firearm : CZ-52 with 4.6" barrel length
Ammunition : Three handloaded Hornady XTP bullets of various weights, loaded to tabulated maximum pressure
Block calibration : 590 ft/sec and 8.7cm penetration
Shot 1 - Hornady 85gr XTP, resized to 0.309" diameter. Impacted at unknown velocity (chronograph read 3313 ft/sec). Penetrated to 11.5" and was recovered at 0.510" average diameter. Track outlined in blue.
Shot 2 - Hornady 90gr XTP. Impacted at 1512 ft/sec and penetrated to 12.3". Bullet was recovered at 0.498" average diameter. Track outlined in magenta.
Shot 3 - Hornady 100gr XTP. Impacted at 1551 ft/sec and penetrated to 13.9". Bullet was recovered at 0.501" average diameter. Track outlined in purple.
The 85gr and 100gr Hornady XTPs were actually a little bit too large in diameter for this usage (0.312") - IE, most bullets I've seen for the 7.62x25mm were 0.308" in diameter. So, those bullets were trimmed down using the Lee lead bullet sizing die, in 0.308" diameter.