30 Carbine Case Bulge Near Head

[Parashooter]

. . . For subsequent loading's, I will run the cases into the full length sizer measure the case length, and adjust the die depth until that 1.285" dimension is reached then stop. My cases still have enough tension to hold the projectile firmly.

Unless I'm mis-reading, this appears to advocate partial sizing. If so, that's not generally a great idea for self-loading arms. Should an over-large case stall while chambering, an out-of-battery "slamfire" may occur. Complete F-L sizing can help prevent this rare but serious consequence.