This is the part about the sport I don't like, squib loads and smaller and smaller calibers.
I don't want to be too hard on original guns as I own a bunch, but if you shot this game when it first came out, there was a power factor that was used to have both minimum and maximum acceptable power, to avoid the smaller caliber advantage. At that time you could use 30-30's and other such chamberings, but it was restricted to cast bullets and couldn't deliver over a certain amount of energy. On the other end, there was also a minimum power factor that was recquired to knock over steel targets, eliminating the lower powered rounds to keep the true spirit of what calibers were actually used in the 1800's.
Granted, the 32-20 did exist in the old days, but it wasn't the common cartridge found in the scabbards and holsters of the day. I have shot this game for years and still use 38-40, 44-40 and 45 colt guns. I also like to shoot "Classic Cowboy" sometimes because they won't allow the smaller cartridges in that category.
The game has also morphed into a speed game and the real essence of the competition has become close, big targets that anybody could hit from the hip, eliminating most of the shooting skill required to hit a target. If I could change things, I would probably vote for going back to the power factor and require the knockdown from the guns that the real cowboys expected with the larger chamberings...