Problem with coated .45ACP bullets

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Problem with coated .45ACP bullets

Postby Morne » Fri Dec 29, 2017 8:10 pm

So I have been experimenting heavily with coated bullets lately. Really like them in general. Up until now I have only run them in revolvers but this morning I decided to wring out my Springfield Armory XDS .45ACP. All my jacketed and plated rounds shot great even with the cold. The coated slugs, though, had repeated failures to feed (kept the slide from going all the way forward). Mind you, I had previously worked up this load out of a .45 ACP revolver so I knew it wasn't underpowered.

As I was pondering the cause I reached for my calipers and measured my plated bullet diameter - 0.4510". Then I checked the coated slug diameter - 0.4525! Well yeah...THAT could cause a hang up...

The cartridge overall length was well below the max. I also checked them in a Sheridan slotted gauge.

I'm really disappointed by this. My guess is that they were sized more for .45LC than for .45ACP. Even though the supplier has this 230-gr slug specifically for ACP and has others for LC. Grumble, grumble.

Guess I'll just load these for my moonclip wheelguns.

Moral of the story - if you're buying coated bullets make sure you buy from a supplier where you can choose a specific diameter. Also, check the diameter when you receive them, no matter what the supplier's label may or may not say. Just because they are "for your caliber" doesn't mean they will necessarily work in your gun.
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Re: Problem with coated .45ACP bullets

Postby JustaShooter » Fri Dec 29, 2017 8:23 pm

Standard diameter for cast bullets for .45 ACP is .452, btw.

That said, it sounds like they took their correctly-sized sized bullets and coated them without re-sizing them to the correct diameter.

Finally, I'm guessing your bullets are into the lands slightly. The XDs .45 tend to have short leade, and of course the slightly oversized diameter is probably a contributing factor, but it should be easily solved by backing off a few thousandths. You can confirm that this is the issue by smoking one of the cartridges and dropping it into the chamber and giving it a firm push, then remove it and see if the lands leave a mark in the carbon.
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Re: Problem with coated .45ACP bullets

Postby Morne » Fri Dec 29, 2017 8:39 pm

I just searched all the coated bullet suppliers. Looks like only Eggleston Munitions and The Blue Bullet offer 0.451" diameter options.

Maybe I'll try some of these fatties in my Sig P320C in .45ACP and see if they work in that. Maybe a 1911, too. :idea:
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Re: Problem with coated .45ACP bullets

Postby Morne » Mon Jan 01, 2018 5:51 pm

As I was going over my spreadsheet of handloading data I realized that I already HAVE shot these very coated bullets from my Sig P320C and they worked fine. I used a different powder and loaded them about 0.010" LONGER than the load I used in the XDS.

So yeah, I am guessing the throat on the XDS is tight/short.

Should I still play around with making these a lot shorter to see if I can get them to work in the XDS? Or should I just keep the XDS on a strict diet of plated/jacketed 0.451" diameter stuff?

I certainly have other .45ACP guns that can digest these...
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Re: Problem with coated .45ACP bullets

Postby JustaShooter » Mon Jan 01, 2018 6:28 pm

I adjusted my practice rounds to fit my XDs so that I could use the same ammo in any of my .45s. I don't like having ammo around that doesn't work in every gun chambered for that cartridge.
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