“Slow” barrel vs. “Fast” barrel

[L.Sherm]

Is a 5R barrel faster or slower than a 3R barrel? Everything else being equal.

Who makes a 3R?

 

[GLTaylor]

I believe Pac Nor used to.

 

[jrock]

This might be a good place to bring up some info. I've talked to a few barrel manufacturers that say the industry tolerance for bore diameter is 0.0000 to +0.0008". I've played with, not shot, some barrels that are +8 tenths and the reamer at the throat barely makes any contact with the lands. Some manufacturers say barrels will still shoot well at that maximum. Not sure I would want one of those on my gun since I know the few high end barrels I've used have been right on bore diameter. I'm sure this plays into barrel speed as well.

 

[FEENIX]

Is a 5R barrel faster or slower than a 3R barrel? Everything else being equal.

Who makes a 3R?

I believe Pac Nor used to.

I think he meant 3G (groove). I have two 3Gs from Lilja.

 

[shortgrass]

I have 338 Benchmark that's 3 groove

 

[fmajor]

I'm not too sure he's still puzzling about it a year later?

 

[FEENIX]

I'm not too sure he's still puzzling about it a year later?

Perhaps but at least @Mc Fraser viewed it per his status when I checked! Just providing proper information for those that might.

 

[Alex Wheeler]

Groove diameter is the main factor here. I have picked up over 100 fps by altering the groove diameter slightly. You have to match it to the bullet your shooting. You can go bigger than you would think but there is a point accuracy will fall off.
3G Liljas are very fast in my experience.