Nice shooting Dave. I am getting similar results with my .58 TC Big Boar and my PRBs. This target is my first outing with the Big Boar. My best three shot group for this setup was about 1.23" at 50 yds. Didn't have my camera that day.
I am taking mine to the range on Wednesday. I have three new conicals to try. As of now I am still using commerical patches, but they are getting close to running out. I will be gettng some pillow ticking and lube them up. When going to Wallie world do the bolts of fabric have the thickness listed on them? I need .015".
I will post a range report on the conicals performance.