AR15.Com Archives
 cold bore 6" right??
jimhoff  [Team Member]
3/4/2010 10:39:53 PM EST
I searched. My cold bore shot landed 6" right at 100 yards. I thought cold shots land higher. DPMS AP4 308. Remington hunting ammo. Is this highly unusual? My warm groups are about an inch wide and 1.75 inch high. New rifle, shitty trigger, 20* f, and at night. Plus I suck.
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Jonnysixguns  [Team Member]
3/14/2010 9:25:54 AM EST
Since no one else has taken a stab at helping...

I am pretty certain as your barrel warms your shots should string upward. Left and right cold bore I wouldn't know. My focus is reduced course high power. Good luck!
darktide  [Team Member]
3/20/2010 7:17:01 AM EST
cold bore... was it clean? or had a fouling shot been used?...

6" off at 100yards seems excessive for any gun for a cold bore shot. 9 times out of 10, when i have a 'cold bore' mistake, its usually an inch or 2 @100m off, and 90% of those i can attribute to not fouling a clean gun...
SteelonSteel  [Team Member]
3/22/2010 3:45:35 AM EST
Not to pick on you but could it be a cold shooter and not a cold bore issue? 6 moa shift is huge.

Next trip out, try warming up your trigger squeeze with some dry fire and/or shooting another rifle first. This will help you and assist you in figuring out if it's the gun or you.
AlwaysPackin  [Member]
4/2/2010 1:45:19 PM EST
6MOA is a pretty big shift, most of what I have seen is within 1 MOA. Try some dry fire drills before you send your cold/clean bore shot, it might help you with the trigger.
joker1  [Member]
4/19/2010 3:53:16 PM EST
Originally Posted By jimhoff:
I searched. My cold bore shot landed 6" right at 100 yards. I thought cold shots land higher. DPMS AP4 308. Remington hunting ammo. Is this highly unusual? My warm groups are about an inch wide and 1.75 inch high. New rifle, shitty trigger, 20* f, and at night. Plus I suck.


I wouldn't be so hard on you. 6" is a huge shift. Maybe you just pulled one a little? Try it again and see if your first shot isn't alot better.
Keigan  [Team Member]
5/4/2010 8:31:36 AM EST
There is no way..... Is the shooter not the rifle.
jimhoff  [Team Member]
5/23/2010 7:51:41 AM EST
Seems like a long time since I started this. My cold bore shots are more like 2" off now. I don't suck quite so bad. I sent the trigger to Bill Springfield and learned a thing or two here and on the Hide. I've also found I need to spring for better ammo.

New question, then:

Why does one kind of ammo shoot 2" left from another. Up and down is easier to understand. Barrel whip? Should I be looking for a new bbl on my AP4?
Multi-G  [Team Member]
6/18/2010 5:52:38 PM EST
There are a lot of factors at work here but start with identifying which bullets and weights are doing what. This will allow you to gather some Intel beyond what you have given out thus far
Mahamotorworks  [Member]
7/22/2010 8:36:07 PM EST
Barrel harmonics. Simply put your barrel reacts differently to different ammo. Depending on when the bullet leaves the barrel during the "flexing" stage of the shot depends on the difference in POI.

Hope that helps.

MAHA

ETA: Link
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