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Rims jamming each other in the magazine
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AussieShooter View Drop Down
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    Posted: July 20 2022 at 3:33pm
Just catching-up on this post - great photo's and explanation of charger reloading.  The rim comparison of modern PPU v war-time was really interesting.  Attached is a photo of a spent PPU 303B from my bag.  I don't know when these were purchased, but I am guessing 1-2 years ago.  photo is a little blurry, but more closely resembles the war-time brass.
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scottz63 View Drop Down
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Originally posted by Shamu Shamu wrote:

It won't fit. Its way too big to fit in the magazine well.
https://giga.joesalter.com/photo/11293/11293-04.jpg
Too bad. That would be fun.
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Points: 396 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Marco1010 Quote  Post ReplyReply Direct Link To This Post Posted: July 11 2022 at 4:32pm
Bren gun magazines were used on the Charlton automatic rifle which repurposed Lee Metford rifles on the Mk 1 and SLME rifles on the Mk 2. but i'm fairly sure this involved a massive amount of engineering rework.
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Points: 16186 		Post Options Post Options   Thanks (1) Thanks(1)   Quote Shamu Quote  Post ReplyReply Direct Link To This Post Posted: July 11 2022 at 12:04pm
It won't fit. Its way too big to fit in the magazine well.
https://giga.joesalter.com/photo/11293/11293-04.jpg
Don't shoot till you see the whites of their thighs. (Unofficial motto of the Royal Air Force)
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Points: 4562 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Honkytonk Quote  Post ReplyReply Direct Link To This Post Posted: July 11 2022 at 9:45am
Anybody ever try to adapt a Bren magazine to fit a No4?🤔 (Be tough to shoot in the prone position!)
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That was one reason for the sharp curvature of the Bren mag in .303 so they'd do that, "jumping rims magic" as they went into the mag. You could use standard chargers. Plus the riflemen in a squad usually had several pre-loaded Bren mags in the big "universal pouches".
Charger adapter for bren:
Don't shoot till you see the whites of their thighs. (Unofficial motto of the Royal Air Force)
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Points: 4562 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Honkytonk Quote  Post ReplyReply Direct Link To This Post Posted: July 11 2022 at 8:41am
Would I be correct in assuming the bullets had to be staggered in a Bren magazine? Was loading a magazine done by hand or did they have a charger? Thanks!
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Points: 5297 		Post Options Post Options   Thanks (0) Thanks(0)   Quote britrifles Quote  Post ReplyReply Direct Link To This Post Posted: July 09 2022 at 1:20pm
That’s a good thought Shamu, get some O2 in the blood, I keep forgetting to do that!  Staying hydrated too is important for vision acuity. 
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Agreed, I'm finding that the time is reducing as I get older too.
If time permits I do a couple of deep exhale (blows out the Co2) & full,but not forced inhale (loads the blood with oxygen) while looking away from the sight picture, just the eyes don't sh*t position, is a big help too.
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Points: 5297 		Post Options Post Options   Thanks (0) Thanks(0)   Quote britrifles Quote  Post ReplyReply Direct Link To This Post Posted: July 09 2022 at 12:09pm
I find that your focus and ability to hold steady during the respiratory pause only lasts about 3 or 4 seconds.  If you hold back the shot much longer than that, it will go astray, your better off going thru the breathing cycle again. Generally, I think your better to move thru the 10 (or 20) rounds fairly quickly.  I sometimes shoot smaller groups in the rapid fire stage, taking one shot each breath, about every 4 seconds. 
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Points: 5221 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Zed Quote  Post ReplyReply Direct Link To This Post Posted: July 09 2022 at 9:21am
Yes 3 minutes is ok plenty of time.  To be honest, I generally clear the precision phase in 3 minutes as well. 
I know some say that it's better to take the full 7 minutes; but I feel that I get uncomfortable after 5 minutes on my elbows. So always shoot faster than necessary.
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Three minutes for ten shots should be quite comfortable to shoot, especially not having to take the rifle off your shoulder for single shot loading.  

Our rapid stage for the vintage matches is 80 seconds and time starts with shooters standing, so you first have to get into position, but even that feels quite comfortable.  It took me several years to slow down my pace, I was finishing in less than 60 seconds. 
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Our match's are shot with 5 rounds in magazine, with a reload of another 5 during the time allowed. This is so it's an equal playing field for those that have rifles with a 5 round mag' as standard.
There is a command to load, followed by the command to fire, which also starts the clock.
Less variety in our matches, it's 200 m prone slow, 7 minutes for 10 shots. Then rapid is 200m prone 3 minutes for 10 shots.
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Originally posted by britrifles britrifles wrote:

My PPU cases don’t have that undercut just in front of the rim.  How long have you had those cases?

Late last year I think on those.
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britrifles View Drop Down
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I’ve found the same thing.  But I rarely have a feeding issue in my Long Branch I use in matches, but it’s only charged with 5 rounds at a time.

Zed, do your matches allow magazine feeding in the prone slow fire stages?  Ours are single shot only.  Rapid fire stages are of course with magazine loading, we start with 5 in the magazine, bolts closed on empty chamber or bolt open.  Then a reload with a five round charger after the first five are fired.  For M1 and AR, it’s two rounds in the first clip/mag and 8 in the other.
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I use PPU in all of my .303's. I use the chargers for reloading in the competition's. If the rounds are properly placed in the chargers, I don't have issues with jamming. However you do need to ensure that the rounds are pushed well into the magazine, and allow the spring to push them back up.
If the first round won't pickup on the bolt; push the rounds down into the magazine well as and let them pop back up.
Usually this will sort them out.
One thing to look out for, is the quality of the charger clips.
There are some awful late production which don't work, scratch the cases and are not made of the proper spring steel. 
Wartime production are generally very good.
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