This is from handloads.com
230gr JHP 5.1 gr Win 231 785 fps Winchester
Suggested starting load: 4.6 gr
Pressure: 20,000 PSI
This is from Hodgdon's website
230 GR. HDY FMJ FP Winchester 231 .451" 1.200" 4.2 751 13,800 CUP 5.3 832 16,800 CUP
And I have a little Winchester data manual which shows a 230gr JHP with 4.8 to 5.1 grain charge with W231
These are all 230gr bullets and I don't know exactly how much the extra weight of the bullets I have will effect the equation. 230gr appears to be the largest weight with widespread published data.
Last edited by pauldy; June 10, 2013 at 12:36 AM.