Marrakai,

Re the Woodleigh recommended performance envelope for the 270gn bullet. I have used Hornady 270RN since '86 in my MS 1910 and the loads I chrono'ed up to 45gns of 3031 match yours in AR2206 to within 20fps.

I only use Woodleighs in the field and recently bought a new box. Specs for 270gn Weldcore RN SN are an SD of .274 and BC of .250. Recommended impact velocity is 1900- 2400fps. Therefore it looks like the maximum performance range in the MS is abt 150 yards.

Geoff Macdonald mentioned years ago that there is a slight waist to the pills in keeping with pommy practice. I don't know if this is still the case.

BTW another recommended not to use the 300 grainers as the stock may be prone to splitting due to age.

Hope this helps.