Hi Jim,
I assume by "sharpshooters" you mean "snipers". I did not think that way, but meant competition shooters, and large calibers were definitely used for this purpose. An example would be the Bisley shooting competitions in the UK.
Above someone has mentioned Flaydermans Guide to American Weapons. I did have copy of this once and found it most informative so if you can get hold of one it would be well worth your while. I do note that ABEBOOKS.COM have copies available quite cheaply.
Stu
|