I think you've found out why S&W sells hammerless and shrouded hammer revolvers.
1) remove the spur from the hammer
2) another way, which I don't particularly like, is to put your thumb on the hammer while drawing. I don't much care for this because a) you might accidentally cock the hammer and b) you have a relatively poor grip on the gun while drawing and must shift your grip (move thumb to the grip) after the draw.
Honestly, the best approach is to get a different revolver.