Sudden Heavy Leading = Shot Out Barrel?

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Longbow said:
Its interesting to note that I've heard similar reports (heavy leading, inaccuracy) on folks using polymer coated bullets in 9mm and .40 cal (Speer bullets?). It becomes apparent when loading to or near max load. The .45 ACP doesn't seem to be affected.
I'm guessing the pressure variation is the factor.
High presure = high heat generation = more melting of the polymer coat?

Saint John (that's Saint John Moses Browning) laid hands on the .45 ACP (and on the gun he created for it) and that's why bad things don't happen to it.:p
 
Longbow said:
Its interesting to note that I've heard similar reports (heavy leading, inaccuracy) on folks using polymer coated bullets in 9mm and .40 cal (Speer bullets?). It becomes apparent when loading to or near max load. The .45 ACP doesn't seem to be affected.
I'm guessing the pressure variation is the factor.
High presure = high heat generation = more melting of the polymer coat?

Not sure I mentioned it but I've been mostly shooting steel plates with enough spare mags to have 200 rounds pre-loaded and ready to go. So lots of fast shooting = higher heat. Could be on to something. I could alternate guns to give them a change to cool down a bit between rounds.

--wally.
 
How to cause leading in a .22RF

1. Buy Remington Thunderbolt.

2. Without opening package, wave sealed brick around muzzle of rifle (chambering irrelevant).

3. Voila! You now have a leaded barrel!


Seriously, I use CCI minimags for cheap plinking ammo, and don't have a problem. Remington is notorious for unreliable priming (especially in a pistol) and the thunderbolt is the only kind of ammo we didn't allow in the rental guns when I worked at a range, because of leading.
 
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Vern Humphrey said:
Saint John (that's Saint John Moses Browning) laid hands on the .45 ACP (and on the gun he created for it) and that's why bad things don't happen to it.:p

Amen! :)
Its still my favorite caliber to reload, not just for economic reason (low pressure, long brass life....).
I have a Dillon 550 dedicated just for loading the .45 ACP.
 
Longbow said:
Amen! :)
Its still my favorite caliber to reload, not just for economic reason (low pressure, long brass life....).
I have a Dillon 550 dedicated just for loading the .45 ACP.

If there were a contest for the easiest cartridge to reload, the .45 ACP would win, hands down.
 
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If the quality control of the ammo is poor, you might get two or three bullets in a row that are poorly lubricated. Hello leading. That's enough to get it started. After that, even well lubricated bullets will add more lead to the bore until it looks like the inside of a drain pipe. Goodbye accuracy.


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