Finally got around to doing a little bit of testing. I loaded 50 rounds of 42.52 H4350 with Fed 210 primers and 140 Hybrids and shot it in the match at Peacemaker Saturday. My initial shots at 1000+ plus were about ~.3mil low and about .2 mil low in the 800-900 yard range so I was wondering if they might be a little slower than the identical rounds loaded with CCI 200 primers. Although later I shot my 308 at the 860 target and it was .3 mil low too, so I wonder if the ranges giver for the targets were right. More on that later.
Sunday I shot the Short Course and Head Hunter at TVP with the 130 VLDs with 44.0 H4350 and CCI 200s. I shot really well scoring 102 out of 120 on the short course and 10 of 20 on the Head Hunter. However, I did have a few fliers and I was missing a lot of shots about .2 mil high. Afterwards, when I got back to the bench at 1000, I should have hit at 7.8 mil. Turned about to be 7.5mil. Even at 7.5 mil I would get the occasional .2 mil high shot. Hmmm.
Last I tested the 140 Hybrids again at 1K with Fed 210 and CCI 200 primers. At 1000 there is less than .1 mil difference in elevation. The Fed 210s might be a hair faster, but it's really too close to tell.
Here is the more later part. I recently picked up a Satorius scale that weighs in .02 increments. I had been loading with my ChargeMaster which only goes to .1. Well, I can tell you the CM's dispersion on the Satorius is about+/- .1gr. With the extruded powders on the Satorius you pick a target number +/- .02, lets say 42.52 because the individual grains of powder will weight anywhere from .02 - .05. So anything that's 42.50 - 42.54 gets loaded. After doing this and comparing the vertical dispersion at 1K for Chargemaster loads vs. Satorius loads it's half. With the CM loads the elevation is good enough to stay on a 10" plate at 1000 90% of the time, with the Satorius loads it's 100%. That explains the fliers with the 130s. (That and they are running about 40-50 fps faster than I thought, ~2980 fps)
Just food for thought.
