Reading through this post again, I see the reference to speed being lost due to case forming. My experience and others that reported the same, was that previous accurate re-loaded ammunition shot well whilst being fireformed. This was the case in my 243AI.

Reading through this post again, I see the reference to speed being lost due to case forming. My experience and others that reported the same, was that previous accurate re-loaded ammunition shot well whilst being fireformed. This was the case in my 243AI.

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Myself and the other guy with same set up both had velocity highs and lows and no grouping. I think that the issue will be more evident the greater the case capacity and the greater the volume gain.