barebackjack said:
What are your honest opinions on caliber for deer. Ive heard people singing the praise of the flatter shooting 50's, and the knockdown power of the .54's, what do you all shoot?
Went through the same decision making you are now... decided on the .54. Boils down to personal preference for most folks, with lots of things to consider. As just one example, I can find a whole rack of accessories for .50 at the local WalMart. Ask about .54 and they act like they don't know such things exist.
But if you want to look at trajectories and "knock down power" (energy left when the ball gets to range), play around with this thing.
[url]
http://www.norma.cc/htm_files/javapagee.htm[/url]
On the bottom of the buttons on the left, click on "Define your own bullet" then use these inputs based on a PRB in a 32" barrel with 1 in 60" twist, and sights "zeroed" for 80 yards....
50 cal (.490 ball):
ballistic coefficient: 0.068
weight: 177 grains
54 cal (.535 ball)
ballistic coefficient: 0.075
weight: 230 grains
Then use your mouse and left click to grab the slider at the bottom to move the muzzle velocity back and forth to suit; and to move that vertical red range line back and forth to set the range to your target.
Let's say I'm shooting the .50 with 80 grains of 3F.... should get a muzzle velocity of about 1740 fps and this gizmo shows me a bullet drop at 100 yards of 1.9" and 431 foot/lbs of energy left in the ball when it gets there.
And a .54 with 90 grains of 3F should get me about 1475 fps at the muzzle, and a bullet drop of 1.8" at 100 yards, with 599 foot/lbs of energy left in the ball.
JPerryE said:
But, respectfully speaking, that isn't true. The ballistic coeficient increases as ball size increases. Given equal velocity, the larger the ball the flatter it will shoot.
What he said :thumbsup: but the difference at BP velocities is pretty small.
*muzzle velocities taken from Lyman's Black Powder Loading Manual