Yesterday I had a friend give me some Swiss 1½ to play with, so I went to the web looking for what it liked as far
as loading/compression/wads/grease cookies in the 45-90 case. I found everything from load for "...little
if any... 2mm compression," to "... its likes to be compressed ½"...."
So today I went out and ran a100-Yd baseline against a Lyman 535 Postell #2alloy seated just short of the lands,
over a simple 0.062 Veg card & newpaper disc, set off by a naked Fed Match pistol primer:
73gr - no compression - 2" group
75gr - 0.095" compression - 1⁷/₈" group
78gr - 0.160" compression - 2¼" group
...then the heavens began to open as I finished the day....
81gr - 0.200" compression - this group: http://i45.tinypic.com/12550tl.jpg
Needless to say, next weekend I'll see where the knee in this curve really is.