Comparing apples to apples

[Rick R]

I obsess when I get a new toy.  It's just the way I'm wired. 

Out of curiosity I measured the length of my 3" GP100 from the back of the cylinder to the muzzle and got approximately 4.6".  It appears that the Glock 20 has a barrel that is 4.6"  So it looks like we have a way to test how much difference Glock's polygonal rifling and Ruger's tight cylinder gap make velocity wise.

Now I need a new chronograph...

and a Glock 20...

and lots of ammo. 

[Kenk]

Lol, don't we all 😂

[The_Shadow]

Yep when it comes to the revolver they don't add the cylinder length as barrel length like a semi auto...  so it will be a nice comparison to see what velocity differences considering the cylinder gap.