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Old 15th August 2012, 11:54 AM
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Scooby Scooby is offline
Pete Dutton
Join Date: Nov 2008
Location: Rotherham
Posts: 2,649

It's supposed to be head size but don't worry about it, it's mostly meaninless anyway...just find a batch that your gun likes & then stick to it.

JSB run lots of dies at the same time, I had 7 current batches of 4.52 from them once & my rifle would only group with 2 of them.

Be careful though as JSB have been known to recycle the popular die & batch numbers, even if you get a different batch of supposedly the same die they can be totally different.

The moral of the story is find what your rifle likes & buy **** loads
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