Glock Twist Rate

[Voldemort]

I'm thinking of building a poly 80% G19 and researching parts. Most after market barrels have a 1:16 while OEM is 1:10. Any experience with the 1:10 versions out there?

 

[G192127]

Maybe the difference is conventional cut optimal twist vs hammer forged poly's twist rate.(they are vastly different concepts)
My experience with aftermarket is they are usually cut rifleing so they can shoot lead.
Maybe consider doing a .40 slide; when you put a 9mm bbl in a .40 slide you get a bigger dia. bbl.
Hope that helps. You probably knew all this...

 

[Voldemort]

No I didnt know any of that, just wondering how a 1:16 twist behave with 115 or 125 grain fmj.

 

[vugger]

I am curious as well?

 

[natdscott]

Dunno. But I do know that most conventional pistol bullets do not require much more RPM to gyro stabilize than a .22 LR. Look at their form factor, SD and BC figures if you're a science-y type, or just hold a couple side-by-side in your mitt if you are a visual type...you'll see why.

The issue though, is that pistols don't typically generate the same speed, so to compensate, the twist rate of the barrel on a pistol--all else being equal--has always been tighter.

My advice: What twist rate do Shuemann, KKM, and Bar-Sto use? If they're good with it, you should be too.
​
-Nate

 

[natdscott]

Found it:

http://www.schuemann.com/Portals/0/Documentation/Webfile_Barrel_Twist_Rate.pdf

-Nate

 

[Voldemort]

Found it:

http://www.schuemann.com/Portals/0/Documentation/Webfile_Barrel_Twist_Rate.pdf

-Nate

That was a good read

 

[natdscott]

Dude knows some stuff. Read the article on his AET barrels.