I still haven't loaded up any patched j-words. In fact, I haven't loaded up anything (other than a few test loads and fire-lapping loads). I have bought some j-words for loading in one rifle but in testing them for throat fit in a few rifles I found that they are pretty loose. Not too bad for the intended rifle though but even so, they are loose in the neck. This got me to thinking, why not patch them and seat them in unsized necks just like I do for cast patched boolits?
I did something along those lines a few years back and found my notes recently. I had seated the bullets into a paper hand towel 'cup' in the neck and soaked that with molten 'waxy-lube' (some of you might remember). My notes say they were accurate. The powder was Varget (AR2208). I did a test with this same method with a cast boolit and it appears the patch/cup stayed on the boolit through the bore. I noted that the 'cup' stuck to the boolit more than it gripped the neck. Anyway, that was a cat sneeze load. So getting back to patching jacketed's, I have some Speer 180gr RN's that are loose in any chamber that I thought might benefit from paper patching, just to get them align in the throat during launch. Maybe the 150gr Hornady's too although those have a larger diameter to start with. Maybe cig paper? More to think about.