.300RUM Remington brass issue

[Mulie87]

Just had a .300RUM built. Loaded Remington brass and one out of four or so will not extract. Guy at the range told me that Remington’s .300RUM heads are not to specs and a few thousands smaller than SAMMI. Anyone ever hear of this or had the same issue? I just ordered Nosler brass (since that’s the most popular (besides Remington brass only due to price) so we’ll see how that works.

[baker5150]

Buddy had the same issue with his RUM and Winchester brass
Switched her to Norma brass and no issues.

[rudysts]

Was your Rum built on a custom action or a Remington action ? if on a Rem action sometimes they have an extraction issue due to poor timing on the bolt handle. I had that issue once with a 7 Rem mag.

[Mulie87]

Remington action.

[rudysts]

This video might help

in my case I had Benchmark barrels build me a 7 Rem with an action they supplied their fix was to install a Sako extractor.

[jasnt]

Adg is making rum brass now

[TheArmoredShop]

Just had a .300RUM built. Loaded Remington brass and one out of four or so will not extract. Guy at the range told me that Remington’s .300RUM heads are not to specs and a few thousands smaller than SAMMI. Anyone ever hear of this or had the same issue? I just ordered Nosler brass (since that’s the most popular (besides Remington brass only due to price) so we’ll see how that works.

Are you using a case gauge for your brass? Full length sizing die?

I’ve seen this happen before, especially in semi’s. If your case gauge is off, they won’t eject properly.

I learned about them not long ago and sure glad I did otherwise the 15k 223 I just reloaded would’ve been garbage. Good 20$ investment


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[yorketransport]

It's more likely that your extractor is tweaked a little bit than the case rims are that far out of spec.

Remington extractors aren't that difficult to replace, even if it's the older riveted style. The parts are about $25 although the proper jig to peen the rivet is a little pricey.

[Mulie87]

No case gauge, but I do full length resize. Just got new Nosler brass and they seem to exract/eject just fine. Albeit they were empty. I’m heading to the range for load development tomorrow am and will report back with extraction/ejection performance using Nosler brass.

[Mulie87]

Shot the Nosler brass today. Didn’t have any extraction/ejection issues at all. Nosler brass for me👍