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hot ammo

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IRON GUTS KELLY View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote IRON GUTS KELLY Quote  Post ReplyReply Direct Link To This Post Topic: hot ammo
    Posted: March/06/2012 at 19:30
I purchased some BVAC ammunition and got some weird results...
The factory claims to be 2550fps 150gr. .308 FMJ BT
The seller claims 2850fps.
 
  Yesterday I shot at 200 and 400 yards with good groups but much higher than they should be. I refigured and my results at these distances I have muzzle velocity at 3000 fps.
 
SO. Is it normal to have ammunition performance that severely incorrect?
 
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Bigdaddy0381 View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Bigdaddy0381 Quote  Post ReplyReply Direct Link To This Post Posted: March/07/2012 at 06:27
Give us more detail of your rifle. Is your barrel 4 inches longer than there test barrel? Is your barrel a "tight" barrel? Was the brass showing signs of over pressure? Was the bolt hard to open


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helo18 View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote helo18 Quote  Post ReplyReply Direct Link To This Post Posted: March/07/2012 at 07:55
Interesting. Waiting dor details.
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Bitterroot Bulls View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Bitterroot Bulls Quote  Post ReplyReply Direct Link To This Post Posted: March/07/2012 at 10:16
IGK,

Just because this load is hitting higher than a different load (even with the same bullet), does not mean the load is any faster. You need to chronograph the load.

Aditionally, 2850 is easily attainable with a 150 gr. bullet in the .308. 2550 would be quite slow.
-Matt
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IRON GUTS KELLY View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote IRON GUTS KELLY Quote  Post ReplyReply Direct Link To This Post Posted: March/07/2012 at 11:39
 
Its a cold hammer forged ceramic coated/lined 20" barrel, 1:10 twist
70F, Alt 950', 80% humidity, unsuppressed
 
I used a ballistic solver and figured drop for 2550 (factory claim) and 2850 (retailers claim)
and using the same ballistic solution program I figured roughly 3000fps by a comparison using the known distances and POA/POI I logged at the range. 
 
I have not had the oppertunity to chrono these rounds... yet.
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IRON GUTS KELLY View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote IRON GUTS KELLY Quote  Post ReplyReply Direct Link To This Post Posted: March/07/2012 at 11:42
No signs of anything irregular in the way it fired or extracted.  
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