Problem with 300blkout

[DFBrews]

1.355 and I actually only took of .005 making it 1.35. Picked up a better micrometer.

where these homemade or bought converts?

[Lurch]

I had someone do the converts.

[Danimal]

I had someone do the converts.

Watch them close, I have had rounds that required a steel rod down the barrel to hammer them out. Those were the ones that went about 80% into the chamber then the bolt drove them to about 90% before locking everything up. I might have a tight chamber on my rifle, because some of the Wilson Combat barrels were known to be a little tight but I have heard of many other people that have had the same problem with the converted loaded rounds jamming terribly in all different types of barrels.

[Lurch]

Watch them close, I have had rounds that required a steel rod down the barrel to hammer them out. Those were the ones that went about 80% into the chamber then the bolt drove them to about 90% before locking everything up. I might have a tight chamber on my rifle, because some of the Wilson Combat barrels were known to be a little tight but I have heard of many other people that have had the same problem with the converted loaded rounds jamming terribly in all different types of barrels.

Been there all ready.

[20X11]

So Lurch, I now have to ask what the brass headstamps are? Are they mostly foreign? There are certain headstamps that have proven to be "nonconvertible". This is because the brass thickness where the new case neck starts is too thick and when a bullet gets seated, pushes the neck diameter beyond .334" (max spec). Subsequently, the round will jam in the chamber, cause overpressure issues, empty case will need to be "mortared" or driven from the chamber. The known bad headstamps would require neck reaming or turning before loading to work properly. You can check 300blktalk.com and search for "the good, the bad, and the ugly" for more detailed info.

[Lurch]

They all were Lake City. From the sounds of everything I need to get the headspace checked the chamber maybe on minimum side.

[20X11]

They all were Lake City. From the sounds of everything I need to get the headspace checked the chamber maybe on minimum side.

Yep...I agree, there have been no reported issues with Lake City brass per se. Sheridan Engineering makes the best case gauge on the market for checking loaded rounds. If the rounds pass that gauge and have trouble in your chamber, it is most definitely an issue with your chamber.