Quote:I get so frustrated when 3-4 shots of a 5 shot group are touching, but the other 1-2 shots are flyturn a sub half-inch group into a 1.25 inch group. ...I've found that when it happens to me, it's due to my having a 'mental slippage' by looking at the group and losing my sight picture/cheek weld....
I'm much better off to ignore the quality of any group and concentrate on keeping my position exactly the same during the five shots...
Quote:I will go to the shooting range and shoot a FABOULUS group with a particular bullet/powder combination and then go back the next week with some fresh ammo loaded to exact same specs..I don't know about your particular area, but at the range I normally shoot, any small breeze can play havoc with groups and that is why I will build ten rounds of each loading and use the second five for verification of any good group that I find...
One of our members, that is pretty much an expert in precision bench shooting, popped some smoke grenades as a learning item at various ranges and to watch the very slight breeze that was present roll across the shooting lanes was very educational...It's almost better to evaluate loads in the early morning or late evening when any wind/breeze is less likely to be present...