9mm reloads, cases bulging, your thoughts

[kthomk]

I am an experienced reloader. All of my loads are within safe loading specs. These were shot from a Taurus P709 slim. I have cases that are bulged down close to the head. Different headstamps, not all as bad. All shot at the same time. Baffling to me. Will these cases still be safe to load or should they be pitched? The rounds shot today were both 125 grain LRN. One was 3.1 grains of clays, the other was 3.6 grains of SR7625. Bulge is only on one side of the case. Bullet is seated deep enough to not be into the rifling. All live reloads fit into the chamber just like factory ammo. UPDATE: As one poster said and is correct, the chamber is unsupported. Shot some more rounds, seems like the bulge problem is sensitive to the amount of times the brass has been loaded, probably 4 or 5 times is all you get. I feel comfortable shooting standard reloads from this gun but will carefully inspect the cases and scrap when bulge is to bad.

 

[Walkalong]

Pics? Load data?

 

[docsleepy]

can you describe or photo of the bulging?
all the way around?

Are your bullets into the rifling?
Do you have the same efffect if you reduce the load by half a grain?

 

[chris in va]

Is the chamber fully supported on your gun?

 

[Steve C]

I agree with docsleepy, make sure your rounds are fully chambering. Could be you rounds are not firing when fully chambered. Remove the barrel and drop in a factory round and then drop in a reload and compare the relationship of the cartridge base to the barrel hood. If they are the same then your round is fully chambering, if not, there's a likely cause. Adjust OAL shorter as needed.

 

[helg]

PT709. Unsupported chamber. See the attached picture. The other pictures and discussion are here:

http://www.taurusarmed.net/forums/index.php?topic=22749.0

 

[Wahoo95]

Is that casing "fully" inserted into the chamber....looks like its sticking out the way it is in that pic.

 

[JDGray]

Sounds like a Glock type chamber. I wouldn't load the brass if it's excessive. If your set up is anything like the above pic, its unsupported worse than a Glock.