I had a Faxon 18 inch rifle length barrel. I had to open up the gas port to get it to run right. The gas port in the barrel was too small. Faxon gas ports are on the small side in my experience.
In a major match you might see 1 out of 10 stages with strong or week hand only. I will shot 10 or 20 rounds each hand when I practice. I will usually shot between 300 and 400 rounds total on a practice day.