Basil
I shoot heavy bullets in my 243 Ackley Improved, using 105grn Rn Speer Hotcore I am shooting thumbnail groups, with a rem 700 & a 1/8 twist shillen heavy barrel, I take deer daily with that rifle out to 220m & they pretty much mostly drop on the spot, although I know alot of people shoot much lighter bullets in the 243.
Be it wright or wrong the 105grns speer RN's work for me-its just a shame that they stopped making them anymore.
I picked up a Sako 75 in 30/06 std of the shelf factory job as a new estate rifle last week & she was shooting inch groups straight away with rem 150 grn serocco factory which I was very pleased with
Regs Lee