I bought a Lyman Forster style mould about 15 years ago, I tryed to load some whith no sucsess, then I read that roll crimp shold be used to get the loads to work. I layed the prodject on ice, some years ago I bought a Ideal roll crimp tool on E-bay and this easter I got some time over.
I loaded four different loads two whith Blue dot and two whith Unique, see the picture. The recoil elevated the sight and I noticed it after the first shot on the third group (thats why the 30 gn Unique got a flyer)
As you can see the 44 gn Blue dot load works fine but now to the problem. When I crimped the shells, the first six I crimped (the blue dot loads) worked fine. They looked just like factory crimped shells and I was real satisfied. When I crimped the next six shells the roll crimps looked like ****.... and I thought maybe it had to do whith the smaller powder charge.
That was what I thougt was the problem. When I came home from the shooting range I loaded 12 new Blue dot rounds for chronograf test and non of the crimps worked
What is the problem? I did the same way, and the shells is shortend 1/4" as recomended in the Lyman shotshell book.
The groups is shoot from 30 yards standing whithout any rest. I understand that it is not impossible to get same groups like the Bue Dot 44gn at 50 yards. The rifle is a Remington wingmaster whith a smoothbore slug barrel.