Looked up some velocities on Lyman
Looked at .50 loaded with 3f GOex
A 26” barrel gets a velocity of 1348 on a 50 grain charge
A 43” barrel gets 1506, about 150 fps for 17”. Interestingly to find a 28” barrel gets 1333, actually a velocity loss for 2”.
But 50 grains is light. I bet on average shooters shoot 50s with 60-80 grains
80 grains in a 26” barrel kicks out at 1690.
A 43” 1854. Again about 150 for 17”
Let’s go to tops, Lyman shows charges up to 170 grains in the 43”, almost 1:1. And 2354 fps.
I’m willing to bet even our hard core big charge guys don’t go over 120. That still will throw out a ball at 2243.
I bet if we did a pole there aren’t to many guys that go over 100 in a .50
At 43” that gets 2095.
A 26” gets 1882, a little over 200 fps.
But what’s the down range.
2100 fps in a .50 slows to 1181 at a hundred yards, 1900 fps slows to 1075, just over 100fps.
I don’t hunt at long range
, at fifty yards it’s 1585 vs 1425, a 150 fps, both will drop a deer, though the 150 fps will make a deer deader right????
Ok can’t get deader than dead, time in flight is .08 seconds vs .14 seconds. Even a running deer won’t go far in the .06 second differnce. Provided you were going to try a running shot
Drop is 1.18” vs 1.3”
Of course you can just play with charges.
A 90 grain charge in a 43” barrel gets 2000 fps, the same as 110 in a 26” or 100grains in a 32” barrel
Of course worries about drop go away with sighting for your hunting range
In the end the reason to have a long barrel is looks or historical accuracy in your gun.