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Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: May/20/2013 at 18:24
bobaldoo View Drop Down
Optics Apprentice
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was wondering if it was normal to have speeds up to 150 feet differant than what hornady states in their book.......

elevation...2900ft                  average speed   2812 7mm 160gr
humidity 50%                                    imr 4831 60gr       
temp 60f                                  hornady 2950-3000 same load
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: May/20/2013 at 19:05
sakomato View Drop Down
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Yes entirely possible

Manuals differ in velocity for the 160 gr bullets:

Nosler - 61 gr IMR4831 @ 2933 fps, so 60 gr would be about 2900 fps
Sierra - 59.9 gr IMR4831 @ 2900 fps
Speer - 61 gr IMR4831 @ 2915 fps
Swift - 61.5 gr IMR4831 @ 2897 fps

So manuals differ but so do individual rifles

Also your seating depth will influence velocities. The deeper you seat and the further from the lands your bullet is, the lower your velocity will be. So if you have a deep throat or you are seating deep in the case, then your velocity will be lower
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: May/21/2013 at 00:07
bobaldoo View Drop Down
Optics Apprentice
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thanks for the input, much appreciated......
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: May/21/2013 at 10:32
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Some barrels are faster than others. Especially if you get a custom barrel. I've gotten an extra 75 fps going to a custom over a factory barrel of the same length. Occasionally, you get a factory barrel or rifle model (such as the Rem 5R) that shoots better than typical.
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: May/21/2013 at 21:30
bobaldoo View Drop Down
Optics Apprentice
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i'm useing a remington sendero which has a 26" barrel, i was under the impression that the longer the barrel the faster the bullet..but i couldn't figure out why so slow, anyways this round groups extremely well so speed is not really the issue here.....
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