Search:

Depending on the caliber and powder.

My main hunting rifle shows almost 200fps gain with the powder it likes in a 25inch barrel, I doubt the gain would even be noticeable in say a 16''

What...

With the exception of two shot with a 303 at over 100y probably my first 50 deer could have been shot with a pistol.
I grew up in the no deer on tops or river flats era, if you wanted to find a deer...