Eley vs S-K ?

A few of the other rounds listed something they called Max MG. I didn't see anything in the brochure explaining what that might be. I sent Eley a message asking what it means.

I did finally hear back from Eley about this. This was their reply:

RSD = Radial Standard Deviation

MG = Mean Group

We use two methods to measure shots in our Proof Range depending on the product. Our premium brands for Target Shooting use RSD so we can really lock down the accuracy and grade the ammunition, Mean Group is used for grading ammunition used in the recreational category.

I'm not sure why they'd want to use two methods with which to measure by, but there you go.
 
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