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Post by hacker54 on Sept 9, 2014 23:53:46 GMT -5
Maybe I should ask how often do you inspect your rounds after you have put them away for a while? OK I was in the ammo locker and came across rounds I did quite or should I say years back that I just did not get to fire yet. Well took them to the range to fire and saw a line in the brass. I ran my finger nail across it and learned it was a crack saw another one . When these were loaded on a single stage and I dd a final inspection of each finished round before putting in the box. OK there in a 100 round MTM box two different 50ct brass from factory rounds. Times load 3 counting factory load. This was 38spl Rem. nickle brass. The ones with the cracks had a cannelure on the out side 50 of these the other 50 plain. So I put my new magnifying glass to use and inspected the box of 100 as stated the plain were fine. The ones with the cannelure were the problem ones to a tune of 20 rounds. I broke these down. So what I'm saying here is if come across some rounds that ya did quite some time ago and want to shoot at the range you might want to give them a once over to see that all is well. Would like to know what happened as they were fine when I boxed them up. As you can see the crack here and I had 20 of these and this was the third time the brass was loaded. The picture was taken through the new magnifying glass. This is going to be one very helpful tool for my reloading.
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dangun
Member
I love the smell of burnt gun powder.
Posts: 517
Location: SW Florida
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Post by dangun on Sept 10, 2014 6:48:42 GMT -5
Gary, I have seen this happen several times over the year. The cannelured brass is almost always the cause. The reason is the stress risers or fissures caused by the canneluring process. Those depressions in the brass have relatively sharp intersections that may not crack when first loaded, but over time and constant stress from a seated bullet will eventually cause the brass to give way. Also it is interesting to note that this usually won't happen with non-jacketed or bullets without gas checks. The reason for this is simple. The lead is softer than the brass and will migrate with long term pressure from the brass. It's good to see that you pay attention to what your shooting! Good Catch!!!
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Post by erjdriver on Sept 10, 2014 8:57:55 GMT -5
Oh wow...thanks Hacker! Though I've just started reloading, this prompted me to add a column for "RELOAD DATE" in my data spreadsheet log to know how long a box has been sitting in the safe when I go to shoot it. Do y'all have any guidance as to whether this happens with just handgun ammo or will it typically happen with ANY bullet that has a cannelure? This concerns me, as the bullets I have for .223 have a cannelure, BUT I won't be crimping them so much as I would for handgun loads.
Good catch, my friend!
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SnapShot
Member
Jeep & Mocha "Remembering Patches, always"
Posts: 699
Location: Finally free from the Republic of Kalifornia!
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Post by SnapShot on Sept 10, 2014 11:59:48 GMT -5
Gary ~ I too had this happen some years back. It was Winchester Brass WITH CANNELURE in 38 Special and jacketed bullet. It was only a few rounds from a box of 50 as I recall. They were reloaded about 4 years prior to finding the cracked cases. The gunsmith I was working with in those days told me the same thing DANGUN has shared here. I have shied away from cannelured brass since then.
erjdruver~ I believe you are talking about bullet cannelure and Gary is speaking of the brass.
At any rate . . . thanks for bringing this to mind. It's a good habit to inspect everything we put into our weapons. ~ SnapShot
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dangun
Member
I love the smell of burnt gun powder.
Posts: 517
Location: SW Florida
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Post by dangun on Sept 10, 2014 16:03:53 GMT -5
erjdriver As Snap said it usually only happen with cannelured brass. Fortunately most brass isn't cannelured anymore at least I don't see much of it anymore.
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Post by erjdriver on Sept 10, 2014 17:10:01 GMT -5
erjdruver~ I believe you are talking about bullet cannelure and Gary is speaking of the brass. erjdriver As Snap said it usually only happen with cannelured brass. Fortunately most brass isn't cannelured anymore at least I don't see much of it anymore. OK...thanks guys. Y'all hit the nail on the head...I was getting off track and only thinking about BULLET cannelure; not BRASS cannelure. I know I saw a few when I was reloading my .38 Special last week. I hope to shoot them in a short enough time span that this doesn't become an issue.
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