COL Adjustment for Accuracy

[George Foster]

I have a load in my 788 6mm that with a 3 shot group the first two shoot sometimes in one hole and at worst they are a 1/4" spread. The third shot always seems to want to drop below the first two and sometimes off to the right also. I have read someplace it seems how to adjust your COL to overcome this problem but I can't remember how you do it. I am now loading to 2.825. If someone could give me advice with this problem I would appreciate it.

 

[FOTIS]

If that is your max that the magazine or throat will allow start seating them deeper ie 2.815 2.805 etc. Also a primer switch may be in order . Also are you letting the barrel cool between the 2nd and third shots?

 

[George Foster]

Yes the barrel cools the same amount of time between all shots, One minute. Between groups it cools for five minutes. I can seat out further than 2.825, should I try it both ways? I figured on seating three at 2.825, 2.820, 2.815, etc. I know in my other 6mm (Ruger 77) it seems to shoot best with a 2.800 COL.