yep just as round ball and gray beard state . while 400 seems low its not when you consider all a projectile needs to do is get to the lungs or the hart 400 will more the do that .
but with bigger game like elk if you hit the shoulder bone then you have a problem . this is where shot placement comes in if the shot is placed behind the shoulder in the hart lung area the RB will still get there .
if you go for a neck shot , 400 will do the job immediately.
For bull elk I like the bigger conical not because a RB will not get to the hart . i have taken many bulls with RB . but more that these guys during the rutt have a ton of stored adrenalin in them and the heaver rounds carries more impact .
As said center fire ballistics are IMO completely out of the realm of most traditional BP weapons
. I have personally seen bull elk take repeated hits from. Magnum center fire round and still keep going. Same with 30 .06 and 7mm . Yet these are very popular round for elk today .
The key is the weight of the projectile as the heavier the more energy it stores and retains to a longer distance . Past that its shot placement you have to place the round , no mater what or how heavy it may be , in the correct spot or the numbers mean really nothing . i have taken more then a few elk with a 30.30 . is the round less then ideal ? depends on the range and the shooter . i myself cant thing of one that went over maybe 100 yards and thats out to distances of 150 yards paced
but back to BP and round balls .
Now if we bump the powder up to 120 grains that 40 more grains what do we get ?
Only 163 fps faster a with 333ft/lb of increase at 100 yards ?? That not even what you get from a 40 grain basic charge at 100 yards ?
With a round ball the increase is even less
Where with the 80 grain charge we had numbers of 1036 FPS and an energy of 422 @100
That same increase of 40 grains only yields us 105 Fps increase and 90 ft/lbs more of energy @100
That same 40 grain charge by itself yields 911 fps at 100 yards with 327 ft/lbs @100
What does this show us ?
Well basically that by increasing the charge we don’t really achieve much for the increases..
That when speaking of RB the energy is at closer ranges
If we look at the 45 cal which was for a very long time a common big game round when it came to deer and I would bet that it safe to say when it come to PB has probably taken the greatest number of north American game. we see that even with a 120 grain load we don’t even brake 400ft/lb at 100 yards and in fact comes in at only 369 ?
So how much does it take ?? Will apparently the old round ball does not take all that much to do the job .