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You start at say min X grains then go up in .5 grain increments to the max at some point the 3 shot group will tighten up then open out again.
You can also use other data from others so if the published load is X then you have 2 grains either side of that E.G say the sweet spot published reload was 40gns then you'd load 3 rounds at 38 - 38.5 - 39 - 39.5 - 40 - 40.5 - 41 - 41.5 - 42 * provided the upper loads do not produce excessive pressures or exceed maximums.
I used it on my 6.5 x 284 & 22/250
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Thanks. I thought so but your explanation makes it very clear.
