I have finalized my two hunting rounds for big game with my 340Wby. I will use the Weahterby Factory Ammo 250gr Partition for dangerous game and my hand load using the Sierra 250gr SBT for all other big game.
The Factory ammo I have already posted the accuracy and the results on my first range report with a five shot group 7/10" and moving at 2990.
The next load is the 250gr Sierra SBT moving at 3020fps and group size is .558", using Weatherby brass, Rem 9 1/2M primers, with IMR7828
First here is pictures of the brass
Group size was .558"