FINALLY - 5 Underwood 10mm Ammo Disections

[RMM]

RMM, did you see small tan flakes mixed in amogst the larger black flakes?  The tan flakes are the identifier in IMR800X, but it is hard to mistake the huge round disk flakes...  

Yes indeed.  Here are some pictures.











I will update this post with an average OAL.  I can't remember where I wrote it down...

[The_Shadow]

Yep! that's what we saw also, good job with the pictures!
Now put it back together and go shoot it!

[REDLINE]

Yep, it's official!

[DAVIDF]

I bought 20 boxes of Underwood's 180gr TMJ & inspected all of them. I measured 3 to 6 samples from each box for COL, a total sample of about 70 (didn't take an exact count). I found that the COL ranged from 1.243 to 1.247. Samples from 1 single box were never a greater range than .003. Measuring COL from 1 box of Federal American Eagle (5 samples) I found a variation of .004. I don't have the measurements in front of me at the moment.

I also measured fired cases from both the Underwood & the Federal. The were both the same at .433" at .125" above the extractor groove. These were fired out of my new Gen 4 Glock 20 with factory barrel & springs.

[gandog56]

I bought 20 boxes of Underwood's 180gr TMJ & inspected all of them.

Jeeze, I felt bad because I ordered TWO boxes when they only had like 32 boxes left! I just got them today, too.