Try crimping a little more.
I haven't used Laser Cast in .40, but I've fired thousands of Bear Creek and D&J bullets with no problems.
I set my crimp by using the barrel as a guage. Remove the barrel from the pistol. Load a representative round. Drop said round into the chamber. Increase the crimp gradually until the round drops easily into the chamber with a satisfying clunk. Don't overdo it to the point of bulging or buckling cases.
Seating depth is also a factor. My Glock 22 (Bar-Sto barrel) likes them a little short at 1.125. My Para-Ordnance P-16 likes a little more length at 1.135.