how flat is flat-nose for tube mag?
Problem: I ordered a flat nose mold for my 1895 marlin, and when I received it the flat part of the bullet was somewhat small. (about 1 hundreth smaller than the primer pocket). Will this mold work as-is, or do I need to enlarge the flat?
Any help would be much appreciated.
"Magazine Tube" alignment photos
Here's the best I could do. Various cartridges- 45 Colt, 38 Spl, 357 Mag, 375 Win, 30-30 Win, even 45 ACP for straight wall, lay-flat comparison. There are two RN in the mix- a 45 ACP, and a 45 Colt, and a 38 Spl WC in there, too.
You can see what would cover some primers (if they were there!), and what doesn't, and what dead centers a primer (RN's go into the large primer pockets!) in the way they lay in the tube. There are large and medium meplats otherwise.
You can see why the 30-30 factory RN's might not hit a primer as easily- they lay way down in the tube.
While doing this, I happen to think that a weak magazine spring would allow the cartridges to move during recoil more than a strong one, or one with a full tube. Maybe that is what happened to Muskeg13's rifle. Maybe a high primer, too? Whatever happened, everything came together to go bang in the wrong places.:shock:
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might not be court testimony, but...
Here's part of the Army accident report that was filed because I lost several workdays. If you still choose to believe it can't happen, that's your choice.
The gentleman who wrote the articles in Rifle Magazine also sent me a long letter in which he explained that while several factors in my case may or may not have led to the accident itself, they definitely contributed to the severity of the damage.
These factors were: sensitive pistol primers (Federal Large Pistol); fast burning powder (10 gr of Unique); and a short fat straight .44 Mag case that takes up most of the room inside of the magazine tube and aligns the cartridges in-perfectly nose to tail. All these combined led to a bad accident, and if any one of these had been different, there probably wouldn't have been a catastrophic failure of the magazine tube.
A less sensitive pistol primer or rifle primer may not have gone off in the first place, or if so, there may not have been a chain reaction where all 6 primers ignited. A slower burning powder may not have produced enough gas and energy to cause a chain reaction, but the first case might have split and the powder only partially burned. Like you can see in Charlie Sometimes' photos, if the cases had been bottlenecked or were longer rimmed cases they wouldn't be aligned with the nose right against the primer, but would have been slightly offset. Finally, if there had been more room in the magazine tube (not taken up by fat straight sided cartriges), there would have been more room for the gas to expand and vent, without blowing the tube apart.