45 auto reloads KEYHOLEING

[huckberry668]

I still use the LFCDs but I had the sizing rings re-ground so they don't size anymore. I like the adjust-ability.

[gotglock99]

I wonder if it's just with the 45 auto? I use the LFCd for ally pistol rounds.

[Corbin Dallas]

I shoot bear creek molybdenum coated lead out of my factory glock 21sf and have no issues. I also use the lee fcd and there is no keyholing as long as the crimp is just enough to grip the round.

My 230s are .452 so you just need enough crimp to stop bullet setback.

[Turo]

False. There is absolutely nothing wrong with shooting cast bullets in any polygonal barrel. This is an urban legend of sorts that was invented on the errornet.

As mentioned earlier, check your crimp and bullet diameter. Also, try loading some without the factory crimp die.

That's why I didn't say there was anything wrong with it. I merely mentioned the possible issues that can arise when using cast bullets with polygonal rifling. I've seen cast bullets tumble when shot through glock barrels, it's not an urban legend that it can happen. It's not every time, but it's possible.

[pdq_wizzard]

I'll post some pics tomorrow

Pics would be nice, I don't see how a bullet can keyhole at ~25 yards.

if the paper is not tight to the board or the board is shoot out the holes will look very strange with round nose pills.

[Bill Steele]

I wonder if it's just with the 45 auto? I use the LFCd for ally pistol rounds.

It very well may not be the crimp or the die. I mentioned excessive crimp as a possible problem, definitely not a sure thing. I have seen keyholing (and other issues like plating separation) when shooting plated bullets if you are crimping too much.

Unlike lead or jacketed, if you use too much crimp on a plated bullet, as the case mouth gets pushed into the bullet you crease the plating. If the crease gets deep enough, the plating will start separating from the lead under it, just like when you push the bullet too hard. Xtreme have pretty thick plating compared to other brands like Berry's, so can take a little more abuse but at some point it can be a problem.

The issue with the FCD is the sizing ring can size the bullet down. If you are loading with a headstamp that uses thicker brass, like Fiocchi or CBC for instance, the FCD's sizing ring can squeeze the brass down as it goes over the round, making the bullet smaller than ideal. This is usually more of an issue with lead where you are starting with a little thicker bullet. IIRC, Xtreme are .451", so unless you are loading a headstamp like Amerc (which you should just be throwing away) or your FCD has a sizing ring that is undersized like I had, it likely is not the problem, just something to eliminate.

Keyholing is a rare condition. It does happen though and the source of the problem can be vexing. I had a problem with keyholing in a Springfield 1911 when I used a particular LTC bullet. It never happened with other style bullets, just that one profile. I just quit using those bullets.

As suggested earlier, it may not be keyholing at all. Did your targets have a firm backing or were they just hanging in the air. RN bullets traveling at slow speed (like a 230gr .45ACP for instance) will tend to push the paper some as it moves through creating oblong or square holes. If the accuracy was otherwise OK (not all over the place), this might also be an explanation. If bullets are actually keyholing (at least when in flight) the accuracy will be really bad, like missing paper bad as you move out much past 10 yards.

[gotglock99]

Well I thought that too about the targets! They have no backing just paper targets hangingin the air! I'm going to go test some more!

[gotglock99]

Picture

some pics.

[CalTeacher]

That's why I didn't say there was anything wrong with it. I merely mentioned the possible issues that can arise when using cast bullets with polygonal rifling. I've seen cast bullets tumble when shot through glock barrels, it's not an urban legend that it can happen. It's not every time, but it's possible.

That can happen with any barrel. There's nothing special about polygonal barrels and cast bullets. The same rules apply for loading cast bullets in standard barrels and those with polygonal rifling. I just feel the need to point that out anytime I see someone try to blame the polygonal rifling in their barrel for their poor cast bullet performance. I didn't mEan to come off as combative or anything.

Not like it matters anyhow because he's using plated bullets.

[pdq_wizzard]

some pics.

Looks like round nose holes with no backing
Like has been said 45 is a slow round, my 9mm fart loads do the same thing

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[CalTeacher]

Looks like round nose holes with no backing
Like has been said 45 is a slow round, my 9mm fart loads do the same thing

Sent from my SAMSUNG-SGH-I997 using Tapatalk 2

That's what I see too. Put your paper firmly against a cardboard backing to see if those rounds are actually keyholing. They most likely look like that because of the loose paper.

[mif_slim]

I think o found the problem, your using tire group.........jk.

Like many said, glock n cast bullets doesn't mix that well. I get keyhole in my XD when my barrel gets major lead fouling....

[j.primo]

What's tire group?

[mjmagee67]

Yep I nailed it a 45 round ain't going to key hole like that, If you think about it a 45 is about as wide as it is long. Shoot on, nothing to see here

[bohoki]

i think that is the bias of the paper tearing on its weakest direction

try different target paper or use brown cardboard for a definite answer