Got a P938 a little while ago to replace my P290 as my pocket gun / summer carry piece. Took it to the range last week and tried to feed it some 115 wwbox with multiple fail to extract issues. Multiple times while firing the gun would not extract the spent round and try to feed the next round into the gun. The only remedy would be to drop the mag and rack the slide to remove the spent casing. After a few of these the slide stop would also stick half way out and would need to be pushed back into place. Called sig and they told me to get some 124 or 145 grain and it should fix it. Went and got some 147 grain hollow points and same issue. Long story short just home from FedEx hoping to get the gun backin 2 weeks.