Found this info in Whitetail Journal June 2011.
Based on purchases in 2010
Top rifle brand:
Remington (17.5% of all purchases)
Top scope for firearms:
Bushnell(17.1%)
Top Muzzleloader brand
Thompson Center(31.9%)
Top blackpowder brand:
Pyrodex(38.7%)
Top balls,bullets or shot brand:
Hornady(28.4%)