I posted a thread when I got this gun and have been giving updates in case anyone is interested. My experience is perplexing. I got 358429 to shoot very well (11/2 in) at 50 yds using 13 gr Lil Gun mag primer and chronyed it at 1650ish fps. When I moved the load to 100 tho, my 11/2 in group at 50 grew to 8" at 100. I tried 14gr, 14.5gr, 15gr, all with the same results. I tried 12gr 2400 at 100 never at 50, and got the same results at 100 tho. I ordered LBT 180 wfngc, same thing. I was able to get 10gr AA#7 to shoot 2-3 in at 100 for 7 shots with 358429 and an aluminum pb gc. Similar results with the LBT 180. This load chronyed 1450ish with the 358429 si I assume it is similar vel with the LBT. I can't explain the poor grouping at 100. These boolits shouldn't be dropping below the sound barrier at 100 when they were launched north of 1675 fps. The Lee 358 158rnfp shoots pretty well, but i'm only pushin it 1350. Am considering trying the Lee boolit with a pb gas check and pushing it harder, but I really wanted a heavier boolit if I need to shoot 100yds hunting.