  | 338 Edge, Brass life test. Rem 300RUM brass |
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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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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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09-24-2008, 01:33 PM
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Re: 338 Edge, Brass life test. Rem 300RUM brass
Quote:
Originally Posted by MagMan
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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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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
__________________
If some is good and more is better, then too much is just right.
My mind is a raging torrent, flooded with rivulets of thought, cascading into a waterfall of creative alternatives
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09-24-2008, 01:35 PM
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Re: 338 Edge, Brass life test. Rem 300RUM brass
Quote:
Originally Posted by MagMan
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.
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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
__________________
If some is good and more is better, then too much is just right.
My mind is a raging torrent, flooded with rivulets of thought, cascading into a waterfall of creative alternatives
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09-24-2008, 03:17 PM
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Re: 338 Edge, Brass life test. Rem 300RUM brass
Quote:
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What kind of Chrono is it?
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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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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
__________________
If some is good and more is better, then too much is just right.
My mind is a raging torrent, flooded with rivulets of thought, cascading into a waterfall of creative alternatives
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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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