Why are my 9mm cases so powder burned after firing?

[charliebrown1999]

I am reloading blazer, Winchester and Federal brass using Frontier 9mm 124 gr CMJ RN bullets, Federal small magnum #200 primers and 4.0 grs Titegroup. I am shooting these reloads in my Ruger PC9 carbine. The fired and ejected cases are darkly colored from the mouth of the case back about 1/3 of the case length. Is that normal???

 

[TonyTheTiger]

It's a blowback action, so that's pretty common.

 

[charliebrown1999]

Thank you for your reply. I should have realized that before I made a fool out of myself with the post.

 

[bfoosh006]

Blowback actions can be filthy ( Wolf ammo is crazy filty dirty )

I can't tell you what exact powder that Winchester uses in their Super Clean line... but those fired cases look like brand new out of my Colt Pattern AR's.

FWIW... here is some 16" chrono data from my 16" AR.

https://www.ar15.com/forums/ar-15/1...129-OEM-rds-52-more-added-May-7th-/16-712312/

 

[TonyTheTiger]

Titegroup is infamously dirty too, so that combo is gonna have those results. Even in locked breech pistols some scorching on the cases is normal .

 

[BullGear]

It's a blowback action, so that's pretty common.

Exactly. Very common and expected.