Has anybody confirmed the BC of the Super Bulldozer 300 cal bullets via long range drop data?
Shot the 212 Seneca out to 1000 yards this past weekend in the Texas Hill Country (mostly limestone rocks). Actual weight range is 210.6 +- 0.3 gn. That stratospheric 0.95 G1 BC seems to hold up: Rezeroed at 100, then shot at rock faces on the mountain at 355, 507 and 998 yards. All high angle shots. Distances were ranged with the Sig Kilo 2400. It shot a little high at 500 (0.5 MOA), and maybe one MOA low at 1000.
But sadly i could not measure speed, as my Labradar has a problem due to a flaky female power socket. So not enough data to do any truing, but based on speed from a week ago (when it was 15 degrees cooler), it seems the published BC is pretty close. [Btw: I used the G7 BC to calculate the scope adjustment, as it is more accurate.]
My forced choice of powder (4000MR) is problematic, too temp sensitive, and it is probably pushing me out of the node when it gets hot outside. [Might have to do a winter and summer load.]
Accuracy was OK at 350 and 500, but not great at 1000. I suspect the ES went way up when the speed moved up (and got outside the node/speed flat spot).
I did not see a repeat of the 0.2 MOA groups posted above at 100, more like 0.8 MOA, another sign that ambient temp pushed me out of that beautiful node.
Now busy trying out plain long kernel H4831 (not the SC version) with the ADG brass. Max speed is slower than 4000MR, probably by 80-90 fps, but the new ADG brass is very resilient (and case capacity is higher), and should help me recover much of that speed loss. H1000 would likely do better, but just cannot find it.
Will know more after the weekend. Fun experiment!
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