Hardball, the sticking in the breech area is caused by 1 of perhaps 3 problems.
1/., is pits due to poor cleaning or the use of pyrodex - or both. That is normal with this powder, BTW.
2/., breech plug does not come to the end of the threads, leaving threads to catch and hold the patch
3/., The cavity in a patent breech having a larger hole than the groove diameter, which is usually or highly unlikely.
Problem #'s 1/. and 2/. are the usual culprits. The steel wool or better yet, a Scoth Brite 'pad' tightly fitting and lubed, on a jag will help solve a pitting problem.
When I measure cloth, the measurements are given as: cloth between the tines of my calipers, the jaws tightly gripped between forefinger and thumb, squeezed about as hard as I can- they are compression measurements, not loose. The reason being a loose measurement is usless in my opinion as the lands compress the cloth, so must I to get accurate measurements of cloth + ball to match and show some compression in the grooves.
Taylor's own .50 Rice barrel, with .016" rifling, shoots a ball that is .005" smaller than the bore, with a .020" patch quite well, but - he's only shooting up to 85gr.2F so far. We'll have to see if the accuracy stays with greater charges - some day.
My own .45 barrel likes anywhere from 65gr. to 75gr. 2F with a water-based lube, but if I use a slippery oil, like LHV, Shenedoah or Hoppe's, I have to use 85gr. 2F. With 3f, it's 65gr. or 75gr., water or oil.
The 10gr. greater charge with oil for lube, duplicates the water lube's velocity.
In my .40 cal, it's 65gr. 2F with water, or 75gr. 2F with oil, or 55gr. 3F water or 65gr. 3F with oil.
In both these barrels, 2F gives closer shot to shot velocities, thus has the 'potential' for greater accuracy.
In neither barrel is there any difference in noticable fouling, 2F to 3F - the loading methods and force is identical - no difference is felt. Contrary to what we've seen in print, both Taylor and I have found that 2f does not appear nor seem to foul more than 3F when using our normal ball and patch combinations.
If switching powders does cause different fouling, something is wrong with the load and your accuracy is less than the gun is capable of as the powder is then building shot to shot and changing the internal and external ballistics shot to shot. In all shooting, consistancy is of prime importance.
The only differences I've been able to ascertain, is that if the pressure gets high enough, 3f will foul more than 2f, due to gas cutting from the higher pressure. Going to an even tighter ball and patch combinaton has solved that problem.
Thus, you can actually get away with a looser combination with a 'weaker' powder, than with a stronger propellent. Meaning, 2F might allow heavier charges than 3f due to the different pressure levels generated.