9mm COL on new Barrel


March 6, 2013, 05:54 PM
I have a Glock 17 that I want to start shooting lead out of. After looking online it is mostly recommended to buy a standard rifling barrel that supports lead bullets better.

I am a new reloader. =)

With that in mind I went ahead and purchased a Lone Wolf Barrel. I got it in today and started doing some plunk tests with rounds that I have already made that fired fine out of the stock Glock barrel.

Here is the bullet information.

Falcon Bullet: 125 gr Lead Cone Nose
Using Hodgdon Universal Clays at 3.9 gr
C.O.L. = 1.125 - 1.130 These tested fine in my stock barrel.

So taking the bullet information above I plunked them in my Lone Wolf Barrel and found that they got stuck.

So I made some test dummy rounds and found that it clears the plunk test at C.O.L. = 1.090 - 1.112

Should I be ok with this new C.O.L.? I have read that if I seat too deep it would cause pressure and I don't want to get near that.

But, if they don't plunk correctly in the barrel that means they are hitting the rifling which is bad too.

Any suggestions would be greatly appreciated.

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Jesse Heywood
March 6, 2013, 06:18 PM
They MUST pass the plunk test. Go with the short COL and reduce your load, then work back up as needed.

chris in va
March 6, 2013, 08:24 PM
1.09 really isn't that short. I had to load my RF bullets to 1.025 in my CZ. Just reduce charge to low/mid range.

March 7, 2013, 12:00 AM
To sum it up, any time you have a new firearm, or barrel in your case, you must start from scratch with powder and OAL. It makes no difference what OAL fits your chamber, it is, what it is.

March 7, 2013, 12:05 AM
Thanks for the responses. I was worried that going that short was bad but after reading the responses and a few more searches this is does not sound bad.

Thanks all for the support!

Sent from my Nexus 7 using Tapatalk 2

March 7, 2013, 01:30 AM
I've heard that Lone Wolf will fix the chamber if it does not work for your loads. Seating deeper than full COL just loses powder room and raises pressure unnecessarily. The short throats in many guns are from the mistaken belief that all you will shoot is military RNFMJ loadings.

Get in touch with the manufacturer and bug them to fix this. You have nothing to lose.


March 7, 2013, 06:15 PM
I also agree with Edarnold on this. There is no reason to have to down load because your OAL does not accommodate standard powder charges, thus increasing pressures. Get them to re-do that barrel so you can achieve standard load data and velocities. But in the mean time, it's all about working those charges up to the restricted OAL to avoid pressure issues.

March 7, 2013, 08:43 PM
You could drop an empty case into the barrel, measure the height sticking out, make sure it's the same with a bullet in it. To make sure it's hitting the rifling, 'paint' the end of the bullet with a sharpie, (load into a case with NO powder), drop into barrel, press a bit, pull it out. If it's hitting the rifling, you'll see marks in the ink. My PF9 has a short throat, need to load most of the bullets I use at 1.100".

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