Made up my first ever 10 .44 Special loads this evening. I have a roll crimping issue. In setting my crimp, I got my OAL set and then backed off the seater and lowered my die to set the crimp. On a couple cases I buckled the case about half way up. I am loading 180 grain lead RNFP and putting the bullet to a seat where the top of the case is right at the top of the cannalure. Should I be leaving the bullet higher and crimping in the middle of the cannalure? I don't have to worry about the OAL in relation to the cylinder length. I hate ruining cases. I'll be test firing the first rounds I made in the morning.