Does anyone use for hunting a rifle with polygonal rifling? My question is not for velocity or accuracy advantage/disadvantage but at the terminal end. Does the lack of the grooves cut into the bullet have any effect on expansion of the bullets?
Also there are claims of polygonal fouling less, opinions on if it would help with copper bullets such as Barnes.
I work for a gunsmith and we make barrels, we have a 30 cal, 1 in 10 polygonal button.

Mark

I can't say just yet. When I get home from Afghanistan next month I should have a .257 Wby Mag with a Poly barrel waiting on me. If it helps with fouling and velocity, great. I don't expect it will that much. We'll see though.

I do not think it will have any effect on expansion.

I have used a polygonal barrel on a long range target rifle.

They do clean up very easy, and you can shoot a lot os shots between cleanings.

I do not think they would have any effect of bullet expansion.

Can't say for a rifle but my HK .45 is a breeze to clean. Compared to my brothers .40 and .45 with conventional rifling.

There have been two countries that used this rifling form on bolt action infantry rifles.

Great Britian used Medford rifling on the early Lee - Metford rifles. This rifling did not work well with British cordite propellant and was replaced by the Enfield form of rifling.

Japan used the segmented rifling in its Type 38 6.5 and Type 99 7.7 rifles.

The majority of the "polygonal" rifled barrels, in todays market, are actually "canted land rifling". Gary Schneider's 5P barrels are a fine example of this.

Thanks for the input.
Sounds like it is easier to clean, not going to effect expansion and stay away from Cordite. The Cordite certainly will not be an issue.
The button we have is marked “Polygon” and on examination with a loupe it is 8 flats.

Mark

Six, eight,twelve lands have been used as far as I know. From discussions It appears that a good barrel is good regardless of the rifling type.It would seem to me that polygonal rifling would be useful with a hammer forged barrel.Aren't all the Styer barrels hammer forged ? They invented the process.

They work fine in any rifle

Aren't all Blaser barrels Polygon?