Well I got my variation for slugs and .375 expanding on ticket this morning. This afternoon I made myself some slugs and loaded them. Now, I could buy them but I like casting and lee slugs are bloody good. This is how it goes...
So I've already done my casting or I suppose you could get slugs for loading if you don't want to make your own. The next thing is to prepare your cases. So with a clear case sporting load I just trim away the inner crimp but leave the turn over plus a bit extra. It's quick and easy with practice and keep the poured out shot for melting down later.
Now you just pop a slug into the plaswad cup which needs a pit of pressure to pass the turnover but that makes it a secure fit. Once it's in it's not going to fall out because the remainder of the crimp and turnover holds it it.
Then do some more. I've zeroed in my red dot sight and had a good practice. I haven't had any sort of jam or failure to eject and although my grouping is only about 4 inch at 20 yards that's with a 1x red dot and i'm very happy with that!