I happen to have some left over Sierra 125gr FPHP (30-30) slugs from my son loading a bunch of 30-30 to learn reloading. I just worked up 1350 30M1 cases ready to be loaded. I made up 2) batches of Hornady 110gr SP slugs using Win 296 and Alliant 2400 powder. And I got to thinking about them left over 125gr FPHP slugs. I did some measuring. And if the slug is seated to the top of the cannelure the OAL ended up coming out within a couple thousands of spec. I made up a couple dummys and checked them for cycling in the carbine. They worked perfect with not even a mark on the lead ring at the edge of the HP. So I started hunting the web for load data. And while I found 4-5 references to using this same bullet in a .30M1 load I found no powder charge data. SO I started looking in my old reloading books to see what might show up. My Lyman # 44 shows a couple of Cast lead loads one at 118gr and one at 131gr. SO I reduced the charges shown for 2400 and made up some test loads. Allowing for a slightly lighter slug (but higher drag due to the copper jacket) I used the data from the 131gr as my guide. Hoping to find a good working load as I think this slug would make a good Home defense load for the carbine. Not to mention a better hunting round then the 110gr Soft Points. Or the 90 gr HP currently available. Some time this weekend I'll run out to the Gun Club and give them a go. I'll report back here with what I find out.