Pass the plunk test, fail the mag test!

muddocktor

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It's time to tell on myself, for not checking measurements.:o

Ive been buying some of the Zero 147 grain JHP bullets to reload 9 MM lately and had tried some out earlier this year, loaded at 1.162" OAL and they shot great out of my Beretta M9. So after trying them out and liking them, I loaded up 400-500 more and didn't recheck OAL since I had just loaded with those dies not long before (the ammo I tried out at the range). I did do some plunk test spot checking and had no problems with them plunking nice in my Beretta barrel.

Fast forward 4 months to yesterday, when I brought the Beretta to the range along with my ATI 1911 and my S&W SW22 Victory. After burning up a box of some junky Browning 22 LR ammo and running around 100 rounds of 45 Auto downrange, I decided to load up the Beretta and shoot a couple of boxes quickly before I left to go home. So I grab up the 147 ammo and my Maglula and go to load some mags and lo and behold, something is wrong and it doesn't feel or act right. I pull off the Maglula from the mag and I see the rounds are sitting down in the mag and not coming up to the feed lips. Oh cr***, what's going on! I tap the mag upside down and the rounds drop down good enough to unload the 4-5 I had gotten in the mag, then tried feeding them in by hand and they were a hair too long. I took the barrel off the Beretta and did a plunk test and sure enough, they plunked just fine like when I had loaded them. So I put them back in the box, put up the Beretta and came home. This afternoon after church I brought those 2 boxes into the loading room and put them to the dial caliper. The darned things measured 1.170-1.171, which evidently is just long enough to rub the front of the mag.

So now I have to run all those loaded rounds back through my Dillon and set the bullets a bit deeper.:rolleyes: So far I've done 150 with no problems except a little higher variance in OAL than normal. About half of them measure out 1.160-1.163 and the other half measure out at 1.164-1.166. I did mag check them and now they load up just fine, like the first batch I loaded up with an average of 1.162"

Moral of the story; recheck OAL when starting a new loading session even if you had everything set the last time you used those dies.:o
 
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A DUMMY 1ST ROUND

1st round with no primer/powder for plunking & testing magazine/cycling can be a big time saver. Nothing like making a few & actually shooting them though.
 
That's the thing; I had plunk tested and shot this particular load previously. My mistake was not double checking OAL on the second loading session with this particular load and making sure the seating die hadn't changed it's setting. I've got most of them resized to the proper OAL now. At least this wasn't a screwup that would have had me pulling loads apart, like too much powder or something like that.

BTW, I like the way that Zero makes their 147 JHP bullet. The base of the bullet is rebated about .003-.005 for about 1/20th inch or so, which makes starting them super easy. You hardly need to bell the cases at all.
 
The 147gr plated RN will work in my pistols at 1.165" but I have
to set them at 1.14" to work in a family members 9mm Kahr, magazine.
Accuracy is ok, so I just now load them at 1.14" at the longest
for all my light target shooting.

With the 147gr........ I do not seat this bullet any deeper than .30"
due to a warning that I saw some where.
It can be done, I guess, you just have to read data very carefully.
Stay safe.
 
Had similar problem with my ATI 45acp. The reloads would chamber and fire OK, but would activate the slide release to lock slide back. Had to push bullets a tad deeper so they wouldn't contact slide release.
 
COAL

Similar experience with my 1911. Normally run SWCs through it, got a box of Berrys HPs in. Loaded same COAL dropped one in a barrel. Perfect fit, loaded up 200 went to the range. Didn't consider bullet shape, they wouldn't load in the mag. Lesson learned.
 
One thing I learned about loading ammo for any Auto pistol..........

was that bullet shape can and will make operation of the action and magazine
dependent on the OAL that it is set at, for each weapon.

Here is an example of two 147gr bullet designs.

 
I was getting started loading up some 147-grain RNFP 9mm for use in my Glock. They were long, but plunked fine. Showed them to Wise_A Sr, sort of a "Look how long the nose on these things is!"

"Huh," he says. "I wonder if they'll fit in the magazine."

Ugh, whatever Daaaaaad,I thought. Of course they fit in the magazine, they fit in the chamber. And I checked anyway.

"And don't just check one, the top one tips up a little. Make sure they still fit when there's a few in there and they start leveling out."

...

I hate it when he's right.
 
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