Here is a question i would like to understand.
When i load for 45-70 with Goex 2f i use the standard method where i measure the ammount of powder that will fill the case to the level where it is just above where my boolit will seat along with an cards i might use. When i use a 500gr boolit i can not get the same volume of powder in the case as when i load a 405grn boolit. Does the increased weight of the boolit and larger boolit surface area (friction moving through the barrel) offset the lighter charge.
So what happens to my velocity(i dont have a chrono) will it stay relativly the same or drop off with the bigger boolit. With smokeless you can get an idea of your velocity from the loading tables but not with BP.
thanks for any insight
Michael