I need to make a correction on a post I made yesterday concerning the Berger. I got looking at my notes and thought that I had made a major mistake so I did the test over today. It turns out that the Bergers take quite a bit more velocity to open than what I originally posted. Part of the problem was, I was also testing some bullets with drilled out tips and confused some of the data. Below is a pic of todays test. I have also determined that the tips that are drilled out will expand down to at least 1900' (maybe farther). I hope to test this further when I get a chance. By the way, this is in no way a knock on the Bergers because as far as I know, they are not advertised as hunting bullets anyway. Also, it doesn't mean that they won't work as hunting bullets within some parameters....Rich
Note the pic of the tip! This is a recurring result with the tip not expanding from the meplat, but rather rupturing, or breaking off, at the end of the hollow cavity where the lead begins. This is around .4" from the meplat which explains the high b.c. of the Berger without needing excessive twist for this long of bullet (i.e. not much weight forward) You can also see that the bullet fired at 1900' was starting to rupture at that point. It appears to me that the pressure entering the hollow point takes a path of lesser resistance which happens to be at the junction of the core and ruptures there rather than expand at the tip?