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IRON GUTS KELLY
Optics GrassHopper Joined: August/09/2011 Location: Topeka KS Status: Offline Points: 27 |
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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
MODERATOR Georgia peach Joined: February/27/2007 Location: Georgia Status: Offline Points: 13682 |
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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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P&Z Firearms , Pro gun cleanings and gun repair and wood refinishing.
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helo18
Optics Jedi Knight Joined: December/02/2006 Location: Montana Status: Offline Points: 5620 |
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Interesting. Waiting dor details.
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Bitterroot Bulls
Optics Master Extraordinaire Joined: May/07/2009 Location: Montana Status: Offline Points: 3416 |
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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. |
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-Matt
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IRON GUTS KELLY
Optics GrassHopper Joined: August/09/2011 Location: Topeka KS Status: Offline Points: 27 |
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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
Optics GrassHopper Joined: August/09/2011 Location: Topeka KS Status: Offline Points: 27 |
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No signs of anything irregular in the way it fired or extracted.
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