MissouriCrowinMass
You do not say what your powder charges were... but when you switch from a Pyro to T7 things are going to change. T7 is at least 10% hotter than the Pyro's and most people plan of 15%.... so if you stayed grain for grain after the switch it could really make a big difference... never mind.... I did not read well enough to see that you were shooting pellets... but there still is a possibility the switch could cause the opening of the group...
Your writing refer to a "wet" patch... I hope you were really refering to a "damp" patch.... if you were are to take the patch and ring any moisture out of it - it is to wet.... take a new clean patch put a little moisture on your toungue and dampen the patch with your tongue... match that dampness with the windex patch.... I will tell you dry patch until you are really confident you have a dry barrel and breech(breech being the most important on a sidelock) but being honest with you I do not use a dry swab any longer, with my prepared patches and the time that it takes me to get the powder ready the ammonia in the windex or even the alcohol in Cayugads solution will have dried.... just do not get the slolution in the breech plug
I broke my Bore Plug after 3 & 8 shots today. Plus, I only hand tightened it this time. No problem getting it out when I got home! Ive been using Miltec Grease. Seems to works fine.
OK I am confused - you said CVA sidelock - what bore plug?