I recently received the above handgun. I bought it new, it is not broken in yet. An it very prone to not fully extracting a fired case when i am using a trunkated cone bullet. The gun fires and extracts rounds when i use standard round nose bullets.
What happens when the gun is fired the slide starts to extract the case as it should. But when the lower edge of the case being extracted touches the bullet that is still in the magazine. The slide looses its grip on the spent case and continues rearward. Leaving the case mouth still in the chamber, the bottom edge of the spent case tight against the next round and the slide coming forward to feed the next live round (which it can't because of the spent case in the way.
The slide can release the spent round any time from when it touches the nose of the next round. Or when the spent round touches the ridge that starts decreasing the dia. of the new bullet. The second location is primarally where the case is released.
I have tried increasing the powder charge to near max., changing the LOAL. With no affect. Yes i used the plunk test and all loads passed. I have tried BE / Unique. I also have Promo, 2400, h110. But i don't think it is powder related. I am thinking mechanical.