Problem with Remington 7SAUM brass

[medic727]

Should have caught this problem waaay sooner: rim diameter .010" oversize. Bought 2 - 100 count bags of Remington 7SAUM brass. Neck turned them, weight sorted them, then loaded up some for test loads. Get to the range and 17 out of 50 rounds wouldn't chamber. Get home and check the seating depth? Check. Measure to see if the brass is sized correctly for my chamber? Check. Measure case diameter at the case web? Check. Inspect the rounds that would chamber versus those that didn't? Che...!?!? Hey, wait a minute the rim looks wrong. The extractor groove is too shallow. Apparently the tool or machine setup that machines the extractor groove may also turn down the rim to SAAMI spec diameter: .535 -.010. The 17 bad cases had a rim diameter of .545. Should have looked at those cases that were in the "heavy" pile a little closer. Shallow extractor groove = heavier case. Lesson learned. However, 17 out of 200 cases? What's up with that? Should have been patient and bit the bullet price-wise and bought Nosler brass.

 

[louielouie]

Not just a 7 SAUM problem - I have noticed that some of my Remington 7-08 brass has a rim too thick to easily go into a 'snug' shell holder. Just another 'sorting' criteria I guess...

 

[Jim See]

I had about 150 out of 500 bulk the same way. I weight sorted all the brass and noticed the missing cut before neck turning. luckily the weight sorting took all the bad ones out as they were 2-3 grains heavy.

I called remington they sent out a return label and cut a check to cover the bad brass.

 

[FroggyOne2]

Seen this problem with Winchester .284 brass too. Extraction groove not cut correctly. Flash holes enlongated and truly wobblely (banana) brass cases.