For cowboy action competition, it's hard to beat a properly tuned 1866 or 1873 Winchester rifle, either Uberti or Miroku Winchester, for speed and smooth function. These rifles predominate at competitions. Especially Uberti. Though the Miroku Winchesters are starting to show up more frequently. Close behind is the Marlin 1894. Properly slicked up, these rifles can run nearly as fast as the 1866/1873's. I see a fair number of these. Running a tight second to Marlin, are the 1892's, either Winchester or Rossi. Also very fast, when slicked up. I do see a handful of Henry rifles, too. Most Henry rifles I've seen have been very smooth and reliable. The only downside of these is the cartridge loading tube. If you have to do a reload on the clock, inserting a round into the chamber smoothly can be problematic. Same with the Marlin. Though an experienced shooter can load a Marlin pretty fast through the side loading gate...I've seen it far too many times to think otherwise....the open-topped Uberti/Winchester 66/73's are far faster to speed load. Likewise the Model '92. My personal favourite: Uberti 1873. Why? A wide assortment of aftermarket parts are available for these rifles (as well as the 1866), so they can be easily modified and made competition ready. The removable sideplates on these rifles also make them very easy to clean and maintain. I see that the Miroku rifles are also starting to catch up now, with competition-ready parts available for these, too. Price wise: the Uberti and Winchester rifles will run about the same amount of dollars. Pricey? Yes. But build quality second to none. Likewise, the Miroku Winchester 1892's. For the more budget minded, either the Marlin or Rossi also make good choices. As far as guns go, most of a person's decision making will come down to what they hope to achieve, as a cowboy action competitor. If you goal is to eventually sit at the top of the leader board....an Uberti 1866/1873, or Winchester 1873 is a good choice. Despite their initial cost. Otherwise, buy what you like, and have fun. Believe me, no one is going to care what you show up with to shoot. Hope this helps.