Not a reply but just my experience. Loaded 124 gr Nukes over 4 gr Bullseye at 1.120. Hellcat will not go fully into battery. Had a hell of a time extracting and case and bullet separated with bullet stuck in rifling. had to punch it out with a tool. Now wondering what col to use. 1.060 chambers but unsure if this would cause a pressure spike beyond safe pressure. Lyman book states max load at 4.8 grains Bullseye at 1.120 col.