Trying to perform a ladder test on my rifle. Stats:
H4350, 53 - 58 grains
165 SGK, bt (not the crimped hollowpoint)
Fixed 10X scope.
Here is what I got at 300 yards, 70 degrees, no wind:
Biggest thing I can see here is that the rifle doesn't really like the upper range of this selection, but between 57.0 - 53.5 grains there isn't a whole lot of difference - other than the the 57.0 grain shot, everything else falls into a 1.5" group. 54 and 56 grain sets are absolutely great, like crazy great. Can anyone shed some more light on this?
The next day I stepped back to 600 yards, here is what I got. Wind 10 with gusts from the 4:30, temp 80
The upper ranges are again not good (so far off they couldn't make the paper). But again I get this group where the charges are all over the map. So what I did was graph them veritically on the side. Left to right, they are 53.0 - 53.7, 54.0 - 54.7, 55.0 - 55.7, 56.0 - 56.7 (that makes the four straight lines, 53, 54, 55, 56).
When I look at those lines I see that the 55 grain set is the tighetest with a 3 1/8" total vertical spread. The 56 grain set grouped second tightest, but the spread between 65.3 and 65.7 is 1.25". The 54 grain set sucked and did not do anything like the 300 yard target - but the tightest three of that group fell into just below 2".
The 600 target shows me too that the 55.0 and 56.0 are falling low and out of the group, I think because of a cooler bore (shoot four, travel to the target, mark the target, travel back). Time between all shots was pretty consistent. The fact that the 53 and 54 grain groups had low shots that were NOT the 53.0 ad 54.0 shots kind of throws that out the window (I think).
BUT - if you look at the 300 yard target I cant tell how these two targets correlate, other than the tightest overall group consistently is the 56.0 - 56.7 grain group.
I need help here - what do you guys think? What is this test showing me? Everything is grouping in a way that I really cannot tell what is going on other than my loads of 58 grains are not what I should be shooting with this combo - it should be somewhere within this data set.
Where do I go from here?
Thankd for your help with this - it is greatly appreciated.