Re: Help-Group Analysis
Check the "head spacing". [img]/ubbthreads/images/graemlins/smile.gif[/img]
does not really sound like seating depth issue.
Is this old problem or new problem. Was is just rebarreled, bedded etc. this helps you know where to look.
really, could be your form in how you are shooting or lastly mechanical in the gun, brass or scope.
if you are not doing something, ie inconsistent pressure on stock, rear bags, shoulder somewhere when shooting or lastly the bedding, scope or brass could be the issue.
so eliminate each in order.
Let someone else shoot it so see if they "throw" a shot each time. that will confirm the headspacing.
Check the torque on action screws first to make sure they are tight. Check the bases and rings to make sure that they are tight.
Reshoot groups. Still issue, change scopes to a scope that is a "known' shooter and reshoot. Good scopes can suddenly go bad.
Lastly shoot 6-8 rounds and keep cases that group together and reload those cases only and shoot again. If those cases shoot good, then measure the bad case base for trueness compared to the good cases. Highly unlikely unless really out of true bad.
Check runout of your loaded rounds before firing.
You have to assume that it is one of the three major things I mentioned above normally, but not always.
could also be 5 yr old glass bedding that is now loose and needs to be redone, possible but not probable.
Look at lugs, if not lapped are the wear marks close to even or only wearing on one lug and then a porting.