DrMike
Ballistician
- Nov 8, 2006
- 37,532
- 6,585
I had a number of rifles to shoot today, necessitating a long day at the range. Most of the work was pretty routine. An 8mm RM that shot to 3080 fps with 200 grain TSX and 0.75 inches (a sweet rifle to shoot). A 300 WSM shooting 165 XLCs (fussy, but finally one excellent load of 0.4 inches). A 300 SAUM (several loads of 0.75 inches with Sciroccos and with a combination of SuperFormance and Berger VLDs). However, the one that really turned my crank was an old BRNO chambered in 7 X 57 Mauser. I had worked up a load with 160 grain TSX, but velocities were quite low, making me uncomfortable releasing it to the owner. I recommended that he try 160 grain Partitions as they would open more reliably on moose. Man, was I overjoyed when I began the first set of loads. This is what they looked like:
That was 160 grain Partitions and RL19.
Then, the second set of loads matched the first:
These were 160 grain Partitions and IMR 4350.
That old beater just flat shoots. Velocities were decent (up to 2575 fps) with low standard deviations (+/- 10). The wind was gusting to 4 m/sec from about 110 degrees. The temperature ranged from 13 C to a high of 18 C in the late afternoon.
I almost hate to turn this one loose. It is a sweet shooting rifle chambered in a great old cartridge. Just thought I'd share some of what was going on. In all, a pleasant day.
That was 160 grain Partitions and RL19.
Then, the second set of loads matched the first:
These were 160 grain Partitions and IMR 4350.
That old beater just flat shoots. Velocities were decent (up to 2575 fps) with low standard deviations (+/- 10). The wind was gusting to 4 m/sec from about 110 degrees. The temperature ranged from 13 C to a high of 18 C in the late afternoon.
I almost hate to turn this one loose. It is a sweet shooting rifle chambered in a great old cartridge. Just thought I'd share some of what was going on. In all, a pleasant day.
