I had the 8-57 ZB Brno over the chrono again last week with an increased load of 4064. I am not posting the grains as this rifle seems to take lots of powder yet still gives low velocities barely breaking 2600 fps with 180 Ballistic Tips. The barrel is 20.5".
I tried RL-15 with less accuracy and similar velocities.
Now its loaded up with RL-10 which is a little faster than IMR's 3031. Accuracy is still good and now the primers are no longer round. The chrono was not along for this last test.
When I tried 150's early on in this particular rifle the accuracy was only fair. Thus the 180's.
