Tony Q wrote:Hey Richard ... you know, when it’s a very important shoot like home clubs OPM or Queens I get new brass and use that.
From a physiological point of view it helps (didn’t help me in the last Queens though) … ummm didn’t help me in the last MBRC OPM either, although I did shoot a 60/60 at 500m I lost the plot when drawing for the days agg.
If you have a set of standard dies that work well and good but this is why they are cheap. They have less quality contol so you might get a good set or maybe a bad set that prduces a heap of run out or other problems. When a std set of dies resize a fired case the die will crush the neck back approx 10-15 thou the expander ball then drags the neck back maybe 5-10 thou on its way back out. this work the brass a lot and streches the case and shortens neck life. Dies like redding and others similar only size down the neck a few thou depending on the chamber size. A neck turned case in a tight chamber will usually only moved a neck about 4 thou on average. most dies like this are set to give about 2 thou crush fit on a proj. so may set them to be 1 thou or 3 thou, whatever works best. But a neck that is varying in wall thickness will give problems with any die setup.
good shooting
Shane
Im not experiencing any problems with group size so i would imagine that everything ok. The low or high shots i do get from time to time can be explaind in 2 ways.
1 Bad Form.
2 Bad Form.
My std 155 .308's shoot about 1/2 min of elevation at any range ... can be 2mins wide due to bad wind reading but thats another issue!
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