The following are loads that I have worked up in my M96 9.3x57. All the brass is 8x57 Remington necked up in 1 pass through a Hornady die. All primers are WLR.
A note on H335- I have noticed increased pressure signs ,on loads in other calibers, developed at cooler temps when shot on hot summer days. It's not an "extreme" temp insensitive powder and is something to consider.
235gr Speer (.375 resized to .366) C.O.L.=3.005"
51gr H4895=2411fps
57gr H335=2566fps
250gr Accubond COL= 3.180"
51gr H4895=2358fps
52gr H335=2392fps
54gr R15=2316
270gr Hornady (.375 resized to .366) 3.166 COL
48.5gr H4895=2266
50gr R15=2152
286gr Hornady COL 3.166
47.5gr H4895=2173
Are those OAL based on bullet / lands? Or dictated by magazine length?