Jump to content
Brian Enos's Forums... Maku mozo!
duffdawg

Glock open gun question.

Recommended Posts

Hey guys, first time posting so sorry if i posted this in the wrong spot. i'm wanting to build a open glock 17 in 9mm major. i was wondering how long you can load in a lonewolf barrel without reaming. thanks for any help.

Share this post


Link to post
Share on other sites

Load a few dummy rounds up! At 1.135, 1.145. 1.160...

If the round drops into the barrel, spins freely, and falls out easily when you flip it over? You're still clear of the rifling.

Repeat until one drags on the rifling when you drop it in and try to spin it, and then keep all of your ammo a few thousandths shorter than that.

Remember also that the shoulder of that particular bullet profile is what is hitting the rifling. A narrow pointy 115gr bullet can be loaded quite a bit longer in the same barrels than a short fat 147gr, for example. The tip isn't what limits your length - until the round gets too long to fit in your Mags, anyway.

Share this post


Link to post
Share on other sites
55 minutes ago, MemphisMechanic said:

Load a few dummy rounds up! At 1.135, 1.145. 1.160...

If the round drops into the barrel, spins freely, and falls out easily when you flip it over? You're still clear of the rifling.

Repeat until one drags on the rifling when you drop it in and try to spin it, and then keep all of your ammo a few thousandths shorter than that.

Remember also that the shoulder of that particular bullet profile is what is hitting the rifling. A narrow pointy 115gr bullet can be loaded quite a bit longer in the same barrels than a short fat 147gr, for example. The tip isn't what limits your length - until the round gets too long to fit in your Mags, anyway.

 
 

 

Thanks for the reply and help. it looks like with the bullet i use atm i can load to about 1.445 gonna load some up this afternoon. and chrono until i i make major. what would you recommend for pf to make sure i'm making major in all temps?

 

Edited by duffdawg

Share this post


Link to post
Share on other sites

Powder choice and your loads standard deviation play into this.

Give this a read

 

Edited by js1130146

Share this post


Link to post
Share on other sites

165 is the min power factor for major...i would load to at least 170...

Share this post


Link to post
Share on other sites
11 minutes ago, Hi-Power Jack said:

What powder and bullet are you using ? 

hs-6 and a 125 grain blue bullet all i have on hand atm in 124 or 125 and i've read some ppl we're making major with it

Share this post


Link to post
Share on other sites

If your ammo is as consistent as typically hoped for, then you can do the old "load to 170 so you have cushion" thing and be okay. There's some padding there for a cold day and a chrono at a major match which is slower than yours.

If you have a high standard deviation (widely varying velocities) then you may need to load over 170 to ensure you make major with every single bullet they might chrono.

And recall too ... that you'll want to experiment to see which load results in the least dot movement - 170 will produce less gass to work the comp than 174 and thus there *might* be less muzzle flip at a higher power factor.

Edited by MemphisMechanic

Share this post


Link to post
Share on other sites
5 hours ago, duffdawg said:

hs-6 and a 125 grain blue bullet all i have on hand atm in 124 or 125 and i've read some ppl we're making major with it

I'd start with 7 gr HS6 and work up slowly with your chrono ... :) 

Share this post


Link to post
Share on other sites
17 hours ago, Hi-Power Jack said:

I'd start with 7 gr HS6 and work up slowly with your chrono ... :) 

i started with 7 as suggested and ended up with 7.9 no signs of overpressure gun shots pretty flat. was making about 168 avg pf

Edited by duffdawg

Share this post


Link to post
Share on other sites

Glocks are limited to magazine limits for OAL. If you run heavy plated, jacketed or FMJ round nose bullets you can load out to 1.155 for a lone wolf barrels. the coated bullets would need to be shorter or they may stick when showing clear causing a squib at the end of your stage (did that)  and dump powder inside your glock. 

Share this post


Link to post
Share on other sites

I actually just got my LWD barrel back from them, for my G34.

 

Not trying to make major, but I wanted to load my bunny fart 147gr minor loads longer. For example, Precision coated 147gr could only be loaded to 1.055", Blue Bullets 147gr to 1.100", etc..

 

I made some dummy rounds at my desired OAL (I think I did 1.160" for those two projectiles, plus some 135gr Blue Bullets TCs) and they reamed my barrel to fit.

Share this post


Link to post
Share on other sites

When you order your barrel request the GT hole, it is a bit larger,longer then their standard chamber.

Share this post


Link to post
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.


×
×
  • Create New...