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Posted: 2/21/2016 10:13:34 PM EDT
[#1]
24gr H4895/Varget under that bullet is a common node. How were the groups otherwise?
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Posted: 2/22/2016 1:19:00 PM EDT
[#2]
Try less powder, 22.5 grains of H4895 shoots well with 75 grain and 77 grain match bullets. I think anything over 23.0 grains is pushing the envelope pressure wise.
Your velocity tells me your too hot. A 20" barrel is close to maximum at 2650 fps. I'd be looking at 2600 fps as a working limit. |
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Posted: 2/22/2016 1:38:54 PM EDT
[#3]
Quote HistoryQuoted:
Try less powder, 22.5 grains of H4895 shoots well with 75 grain and 77 grain match bullets. I think anything over 23.0 grains is pushing the envelope pressure wise. Your velocity tells me your too hot. A 20" barrel is close to maximum at 2650 fps. I'd be looking at 2600 fps as a working limit. +1 22.5 grains of H4895 for the H75 is a common Service Rifle Pet Load. Those are typically 1:7 20" bbls and generate a very consistent 2650 fps for WOA and CLE prepped rigs. How did those primers look on the heavier charges? |
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Posted: 2/22/2016 11:46:08 PM EDT
[#4]
I shoot a load of 24 grains of H4895 over a 75 AMAX loading .01 off the lands which is into single load only area
It shoots better than me at 600 yds and has no pressure signs and still have good brass life |
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Posted: 2/23/2016 10:14:23 PM EDT
[#5]
Quote HistoryQuoted:
Try less powder, 22.5 grains of H4895 shoots well with 75 grain and 77 grain match bullets. I think anything over 23.0 grains is pushing the envelope pressure wise. Your velocity tells me your too hot. A 20" barrel is close to maximum at 2650 fps. I'd be looking at 2600 fps as a working limit. I'm right there with you and RegionRat for 77 Nosler CC's, except with 22.5 of IMR 4895. It gave me a 93-2X my first time at 600 yards at Perry out of my RRA NM. Not sure what the velocity is, don't have a chronograph. |
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