I've been practicing gun mount every day trying to get muscle memory and fluency left handed. In doing so, it was apparent that my guns are all set up for right handed shooters.
|note the palm relief beveled into the stock for Left Handed shooters|
His website is http://www.gunstockfitter.com/ and he explains in much better detail than I ever could the different components and setups on a gun that aid in your shooting. If you're in Northern California and shoot and have never had your gun custom fitted to you - I'd say find him at a club nearby and at least have a chat with him. I don't think you'll regret it.
Now it's practice practice practice to hopefully be tuned enough for the fast flying targets in South Dakota!