Single Edge Polygonal Rifling

[Skeeter98]

Has anyone heard of this? I came across this looking at Triarc's barrels. It sounds like it has the same benefits of 5r/ polygonal rifling. Basically, each land has a straight edge and then a smooth or polygonal edge . It like a mix between conventional and polygonal rifling. The benefits are it provides increased bullet accuracy, less deformation, less friction and a tighter gas seal with increased barrel life. I assume it would also have the benefit of less barrel fouling. The actual patent on this is fairly recent belonging to a guy with the last name of Feddersen who is a renowned competition shooter. Theoretically, does this offer a benefit over polygonal/5r rifling? This rifling setup seems really interesting and not too common.

[MegademiC]

I would be shocked if people realized a benefit in an AR barrel.
Having never shot out an AR barrel, im curious how rifling extends barrel life.

Its an interesting concept, and would try it out, but I wouldnt pay much extra for it.

[HelloLarry]

I'm surprised that is patentable. That's just a minor rehash of ratchet rifling that has been around since the 1800s. I doubt it has any advantage over ratchet rifling where the root of one land starts at the terminus of the preceding. I don't think it is bad, just not of advantage.

I personally like ratchet rifling. I think it exposes fewer land corners to potentially chip off in the throat, prematurely destroying accuracy.
british_riflingB.jpg

[ExplorinInTheWoods]

Rev arms was doing this 2-3 years ago but went under. They had stupid accurate barrels and they were getting better muzzle velocities. It’s similar to having a noveske stainless barrel.i have a buddy that got a 12.5 from them and he says it’s lights out accurate and has muzzle velocity of a 14.5

[joeg26er]

I got a Triarc 12.5 on a pistol setup. Still need to run chrony on it. Anyone have specific ammo they are curious about velocities?

[1168]

I got a Triarc 12.5 on a pistol setup. Still need to run chrony on it. Anyone have specific ammo they are curious about velocities?

Fusion MSR, please. Also M855, MK262, and M855a1 if you have it. I’ll be happy if you just test Fusion MSR.

[joeg26er]

Fusion MSR, please. Also M855, MK262, and M855a1 if you have it. I’ll be happy if you just test Fusion MSR.

I have none of those except for black hills 77gr otm
M193 imi, magtech 62gr, Speer gold dot , wolf gold 55gr, sb 55gr

[MQ105]

I have none of those except for black hills 77gr otm
M193 imi, magtech 62gr, Speer gold dot , wolf gold 55gr, sb 55gr

I think a Gold Dot test would be good info. 77 and 62 perhaps? I'm also interested in the Wolf Gold velocity from that barrel.

[1168]

I have none of those except for black hills 77gr otm
M193 imi, magtech 62gr, Speer gold dot , wolf gold 55gr, sb 55gr

Pm me your address. I’ll send you some ammo, if you’ll chrono it. Might be a week or so for me to get to the UPS Store. We are talking about a Triarc Track 2.0, correct?

[joeg26er]

Yes I have a 12.5 triarc track 2.0 barrel
Built on a San tan billet set