Getting signs of over pressure, with a load that should be very light.

[nola jack]

115 gr plated xtreme bullets
5 grains power pistol
OAL 1.12
CCI SPP
Glock 19
Using a dillon square deal B

I confirmed my press is putting out the correct charge. Confirmed my scale is good by using the 50 gram weight. Put about 15 rounds through the calipers and they all were between 1.115 and 1.125.

I'm getting a big fireball, some stout recoil, and the primers are stamped with the rectangle. Don't have a chronograph. Am new to reloading.

Primers look like this

http://www.glockforum.com/forum/attachments/f12/41896d1359531225-looks-over-pressure-image-2256516930.jpg

[pdawg_shooter]

Need more
info. What is the load, the bullet, the primer, and the firearm in question?

[LUCKYDAWG13]

the primer strikes look a lot like the ones my XDs make

[petroid]

How are you crimping? What is the case mouth od of a loaded round? What primers are you using? Magnum? Hopefully not small rifle by mistake. Is the gun clean?

[Mallard57]

You're shooting these out of a Glock I would assume. The primers look normal to me, and if I remember right Power Pistol does put out a fire ball. I tried to look up your data on Alliants website but load guide is down.

[Plastikosmd]

Try some factory stuff and see if just an imprint issue with firing pin?

[ACrowe25]

Back the load down 10-15% and see where thy takes you. Work back up. To 5gr. 5-10 rounds of each and make a decent spread.

[nola jack]

How are you crimping? What is the case mouth od of a loaded round? What primers are you using? Magnum? Hopefully not small rifle by mistake. Is the gun clean?

I am using Dillion's crimp for the case. The primers in the picture aren't mine, just same rectangle stamping. Using CCI 500. Case mouth OD .376 plus or minus a thousandth. The gun is filthy. Cleaned it last night after around 15k rounds.

I loaded 10 rounds at 4.1, 4.3, 4.5, and 4.7. I'll try to get to the range tonight to see what works.

[dubber123]

I checked 3 sources, and all list 6.5 to 6.7 grains as max with a 115. Your primer marks look "Glock normal" to me.

[Jupiter7]

Also, there are no true signs of overpressure in pistol cartridges. That brass is normal glock brass.

[ReloaderFred]

Glocks leave the rectangular raised metal on primers as a matter of course. It's what they do, and are not an indicator of excess pressure at all. It just tells you the brass was fired in a Glock.

Hope this helps.

Fred

[nola jack]

I guess I just never noticed until I was looking for it

[35remington]

You are good. No need to worry about it further.

The downside of Power Pistol is that it is very blasty. You'll shoot it and think "Wow! That was way more powerful than my other loads!"

Then you look at the chronograph reading and realize it's the powder as the velocity may be average but the blast will still be there. It's a perceptual thing.

[petroid]

Whether the primers are glock fired normal or not the recoil shouldn't be too excessive. I have loaded power pistol to 6.0 with 115gr plated and recoil wasn't excessive. It does have a lot of muzzle blast though. I personally would back of the crimp die a little. Just taper crimp til they chamber easily. Excessive crimp can raise pressures and swage the bullet down reducing accuracy

[nola jack]

What would be a good OD to aim for?

[robertbank]

Go by feel. Set your die so you just remove the belling. Run your finger over the case mouth if it feel flat you are there. 9MM bullet/boolits are held in by case friction. The problem with quoting an actual size is you introduce brass thickness as a variable plus how the measurement is done. I load around 12K of 9MM a year on my 550 Dillon and and have not touched my crimping die once since I set up the die on the tool head about 15 years ago or more....time flies.

Take Care

Bob

[seaboltm]

Also, there are no true signs of overpressure in pistol cartridges. That brass is normal glock brass.

+1 Keep shooting them.

[petroid]

Saami spec for case mouth is .380 not all guns will feed at this. Adjust crimp die til they chamber then give a little more for insurance. You may be right there already

[nola jack]

Thanks for the advice guys, I'm going to go shoot those other rounds and I'll give an update when I get back

[MtGun44]

Primers look normal for a Glock.

Bill

[historicfirearms]

Make sure you are not getting bullet set back. The bullet could be getting pushed back into the casing a bit during chambering, which can raise pressure.

Also, do a "plunk test" with a dummy round. Take the barrel out of the Glock and see if the round easily chambers.

[nola jack]

You are good. No need to worry about it further.

The downside of Power Pistol is that it is very blasty. You'll shoot it and think "Wow! That was way more powerful than my other loads!"

Then you look at the chronograph reading and realize it's the powder as the velocity may be average but the blast will still be there. It's a perceptual thing.

Yeah, I think that is pretty much what happened. My glock doesn't even cycle them below 4.3 grains. An abundance of caution combined with a lack of experience. Thanks again for all the help guys.

[Old Caster]

Nola Jack, There is nothing wrong with being careful when beginning something new. You are on your way.

[osteodoc08]

As stated. Typical for glock.

A chronograph can can be an invaluable tool. Use this as an excuse to get one if finances allow.