How many grains of powder are you using in the 300 Wby to get over 3,700 fps mv with the 150?
That's the question we have here.
OK.
Here is the original load development.
"96 and 99 gr of re25". 150gn = "3650-3800"
3 of my friends now run these sorta loads. Here is some of the latest data compiled by him.
"101gn Re-25 = 3787 - 3812fps". All .5" at 100(3 shots. Mark V).
WITH NO SIGNS OF A HOT LOAD
The secret here is to vibrate em down with your tumbler. Also, as R-25 is a slow burning powder recoil is not like it is with other powders. Rather a push than a sharp jolt.
Just do not try this with heavier pills. If you are using the 270Roy stick with 130's, 300Roy keep it to 150's!
