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338 Edge, Brass life test. Rem 300RUM brass

 
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  #1  
Old 09-24-2008, 01:03 PM
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338 Edge, Brass life test. Rem 300RUM brass

I've been wondering how good my brass life was going to be in my 338 Edge, so I decided to run a little test. I loaded a once fired brass and took 10 pre-measured powder loads to the range with me today. I figured I'd get 4-5 loads and would be able to verify my findings, by running the test twice. Well I was pleasantly surprised.

I loaded the same brass all 12 times. The primer loosened a little after 2 firings, but was still plenty tight. I watched the length of the case and trimmed .001" after the 5th and 10th shots. The 12 shots averaged 2752fps with an ES of 29fps and an SD of 9. I knew the ES wasn't going to be great, but it matched the ES I found with this load and seating depth.

The load is a cci250, 92 gr of H1000 and the 300gr SMK.

All 12 rounds went just over 1/2" CTC.

The barrel was cleaned last night and I shot 3 foulers before I started the test. Those 3 rounds went .196" CTC (the best group so far from this barrel).

Is everyone getting this kind of brass life in their Edge? Or am I just running a really low pressure load? Or maybe my chamber and dies match?

Thanks,
AJ
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Old 09-24-2008, 01:30 PM
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Re: 338 Edge, Brass life test. Rem 300RUM brass

AJ, I've got some that have been fired 3 times and the pockets are noticeably loose. With 92 grains of H1000 I was getting 2824 with an extreme spread of 10. I recently shot my chrono in the face so the new one is giving me crazy readings 2932 with a really good ES.

Has anyone ever seen that kind of reading with only 92 grains of H1000? My POI never changed so I'm thinking I have a bad unit.

On a side note after three firings I have yet to do any sizing to the body and they still chamber just fine. So how can you have loose pockets with no or minimal case strech?

AJ, I will make time the weekend after next (4th or 5th) if you want to come up and play. I have a garbage bag full of milk jugs begging to be shot.
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Old 09-24-2008, 01:33 PM
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Re: 338 Edge, Brass life test. Rem 300RUM brass

Quote:
Originally Posted by MagMan View Post
...

AJ, I will make time the weekend after next (4th or 5th) if you want to come up and play. I have a garbage bag full of milk jugs begging to be shot.
I'd love to, but I am busy that weekend and will be heading to Colorado for an Elk hunt the week after that.

As far as the primer pocket, it noticeably loosened after 2 firings, but stayed that way for the rest of the test. Not loose enough to worry about for sure.

AJ
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Old 09-24-2008, 01:35 PM
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Re: 338 Edge, Brass life test. Rem 300RUM brass

Quote:
Originally Posted by MagMan View Post
AJ, I've got some that have been fired 3 times and the pockets are noticeably loose. With 92 grains of H1000 I was getting 2824 with an extreme spread of 10. I recently shot my chrono in the face so the new one is giving me crazy readings 2932 with a really good ES.

...
I'd shoot one of my other rifles through it and see if it is also way above normal velocity.

What kind of Chrono is it?

Mine is the CED with Infr-red screens.

My ES with this load is very dependent on seating depth. A little longer than I was shooting today and I have an ES of 7-8fps.

AJ
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Old 09-24-2008, 03:17 PM
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Re: 338 Edge, Brass life test. Rem 300RUM brass

Quote:
What kind of Chrono is it?
The green POS that flips open. It's borrowed and I'm thinking about doing someone a favor. Not sure if anyone has ever gone through 2 chronos in 1 week.

I'll be picking up a CED.....I've been looking at them lately.

This weekend is the youth hunt and its my favorite season (but short). We've got a handful of little guys looking to shoot some bucks.
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Old 09-24-2008, 03:27 PM
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Re: 338 Edge, Brass life test. Rem 300RUM brass

I have one of those and it is very generous with the velocity as well

AJ
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Old 09-24-2008, 03:48 PM
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Re: 338 Edge, Brass life test. Rem 300RUM brass

[QUOTE=MagMan;229812] Not sure if anyone has ever gone through 2 chronos in 1 week.

i was at a range and heard but didn't quite see a guy hammer 2 chronos with one shot. it made a weird noise.

i would agree with the primers getting loose after only one or two shots. then they stay about the same for a while. i shoot with my face on the receiver so i'm a little concerned about the loose primer thing. i got some RWS jeffery's brass to form into the edge, thought this might wear the barrel out before the brass.
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