The 1990 IMR powder Paperback manual is full of the data which you seek. Is there a target velocity and bullet weight? I can post some data here but if you will send me a call phone number by PM I can send you pictures of the 243 Winchester sections.
Take care, and good Luck,
Rick
I have an older IMR Manual which shows IMR 4198 in the 6mm Remington with 80 and 100 grain bullets, but it does not show it in the 243 Winchester. Does your manual show it?
