I also have the 20" 500 S&W Katahdin rifle barrel for the Encore. A 325 gr Gold Dot smacks your shoulder pretty hard. Accuracy leaves something to be desired too. The 28" Pro Hunter in 30-06 is shooting sub MOA at 100 yards. Much more pleasant to shoot and more accurate. I have a Boyd's thumbhole stock and beavertail forend for that configuration. It is topped with a 10x Bushnell 3200 scope.
I'm inclined to favor rifles in .22, .30 and .45 caliber. That allows loading multiple cartridges on a variety of brass. The 100 gr Plinker bullet is pleasant to shoot out of a 30-30, .308 or 30-06. A 200 gr FN plays just fine in 45Auto, 45LC, 454 Casull and 460 S&W. A carefully selected .22 can serve for .223 or 5.7x28.
The Encore pistols in those large calibers are hard on the elbows and the rifles are hard on the shoulder and possibly the retina. I have read of detached retinas in people who fire major recoiling rifles like the African British Nitro rounds. I am, however, a glutton for punishment. I recently ordered a Bullberry 10 inch Encore barrel chambered in the very old .50-70 Government(predates the .45-70 by 7 years). The history of that round is very interesting. It is about .25 inch shorter than the .45-70; originally fired a .515 diameter bullet, but current production (Italian Sharps and the Lone Star reproduction Remington Rolling Block) calls for .510 bullets. (Same as the .500 Linebaugh) Cases are available from Starline and .510 cast bullets from several sources. Barnes has two jacketed .510’s, a 300 and 450 grainer. The Bullberry has a 1 in 16 twist which is very much faster than the original Sharps (1 in 48, then later, 1 in 36 and finally 1 in 24). I figure in the Encore pistol, this will be the .500 Linebaugh on steroids.