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Rifles, Reloading, Optics, Equipment
AR15/10 Rifles
Dmr/sdmr build and testing report.
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<blockquote data-quote="pondskipper" data-source="post: 1314374" data-attributes="member: 26430"><p>Was able to get some more velocity testing done yesterday with the 77gr black hills MK262 and the Hornady 75 gr match, the gun still doesn't seem to care for the MK262 as much as the Hornady as far as group size is concerned which I guess when you measure the group and remember its coming from a gas operated semi auto rifle its still nothing to throw rocks at measuring just under 1/2" but what really caught my attention with it was the ES I was getting from it, the average ES is 9 fps for 10 shots and those of you reading that shoot long range will know just how important that is as distance begins to increase. The hornady is still maintaining the smallest group size in the rifle for sure but the ES is pretty high in comparison at around 32fps but it definitely makes you look a pro at short range measuring .250" center to center.</p><p> </p><p>Black Hills 77gr 5.56 velocity average is 2770 fps. Es of 9 fps. average group .485"</p><p>Hornady 75gr match velocity average is 2694 fps. ES of 32 fps, average group of .250"</p><p> </p><p>All groups were shot prone, from a bipod at 100yds using only a rear bag rest.</p><p> </p><p>Chronograph used was a Magnetospeed V3</p></blockquote><p></p>
[QUOTE="pondskipper, post: 1314374, member: 26430"] Was able to get some more velocity testing done yesterday with the 77gr black hills MK262 and the Hornady 75 gr match, the gun still doesn't seem to care for the MK262 as much as the Hornady as far as group size is concerned which I guess when you measure the group and remember its coming from a gas operated semi auto rifle its still nothing to throw rocks at measuring just under 1/2" but what really caught my attention with it was the ES I was getting from it, the average ES is 9 fps for 10 shots and those of you reading that shoot long range will know just how important that is as distance begins to increase. The hornady is still maintaining the smallest group size in the rifle for sure but the ES is pretty high in comparison at around 32fps but it definitely makes you look a pro at short range measuring .250" center to center. Black Hills 77gr 5.56 velocity average is 2770 fps. Es of 9 fps. average group .485" Hornady 75gr match velocity average is 2694 fps. ES of 32 fps, average group of .250" All groups were shot prone, from a bipod at 100yds using only a rear bag rest. Chronograph used was a Magnetospeed V3 [/QUOTE]
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Rifles, Reloading, Optics, Equipment
AR15/10 Rifles
Dmr/sdmr build and testing report.
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