One of the reasons Encores are so accurate is due to the tight tolerances in the barrel.
I shoot one and would not change for anything. I shoot 110 grains of 777 under a 250 grain shockwave sabot. Shoots 3 inches high at 100 yards, 3 inches low at 150 and 7 inches low at 200. Groups at 100 vary from cloverleaf to a max of an inch and a half. The gun is as accurate, if you are consistant w/ loading and technique, as you are. What I do between shots is two spit patches, both sides, then a dry patch, both sides and load again like normal. No extra effort, other than the normal tightness, with another sabot. But, in a reload situation, there is no time to run patches through the barrel and you want a quick reload.

That said, I shoot 250 grain Shockwave sabots and they are very hard to load. I have never tried to load one with a dirty barrel. What I do is keep one tube in my jacket with a 295 grain powerbelt and two 777 50 grain pellets if a followup shot is needed. Couldn't be faster or easier. Just drop in the pellets and the powerbelt loads easily. Now, this load will never equal the power or accuracy of my hunting load, but it is fine to finish off an animal if needed. Have never had to use a second shot though, of the 6 I have taken in the past year, none have gone more than 40 or 50 yards.

So, yes some sabots are hard to load in an Encore, but the effort is very much worth it and you can use a very easy loading power belt for a finish off shot if needed. BTW, this is the only use for powerbelts in my book. They are ok for light to low-moderate powered shooting but perform very poorly when the charges creep up in strength. I have personally had one "blow up" inside a deer from less than 75 yards and seen some others with similar performances.
R
Hank