I was trying some Winchester 100g .243 today - the first two shots were spot on, but the third was 2" out every time (left or right and up or down).
Shooting 90g Sako all 3 shots are fine.
I was shooting off my roe sack to simulate real life, with the moderator on at 100m.
Without the mod the goups were appalling, so im more than happy to cart it around on the rifle!
Its no problem really, just curious whether im the likely cause or the rifle?