BIG DEAL Proofs New barrel Total game Changer?

[KonoctisWigwam]

FWIW, about 10 years ago, progressive teeth became popular on handsaws for woodworking. The idea is similar, that as you push through the stroke, the teeth get progressively smaller as you get to the heel of the saw.

I never bought into it, as it's expensive/time-consuming, and I don't personally believe the gains are worth it. My $0.02.

There was also a lot of controversy over a canted blade. Handsaws used a folded back, if you go back to the 1800s, prior to America's industrial revolution. The first industrial revolution happened in England (textiles).

I wonder how they do it on rifling though. I believe you would need to use CNC to control the rifling length, so that it adjusts automatically as the barrel is rifled. Interesting to see it happen with barrels. I don't think it would be possible to do on a Pratt Whitney rifling machine, the way people have been rifling barrels for centuries.

 

[KonoctisWigwam]

Iirc every barrel cut on a Pratt and Whitney has some gain in it

That's interesting, as I thought the Pratt Whitney worked on gears.

 

[stazmania]

Sounds like it's normal gain twist but an extreme increase vs the more typical half an inch or so you seen in other cut rifled barrels? combined with a gradual transition into the he rifling.

Nothing radical but I liked my gain twist cut rock creeks

Iirc every barrel cut on a Pratt and Whitney has some gain in it

This seems pretty radical. here is the xring channel info. "" It would be interesting to see the engraving from the rifling on a fired bullet. Also the potential for copper fouling. Also if bore diameter and rifling/land height is progressive also. And how is it cut, EDM, single point cut or?

 

[bultinkle]

That's interesting, as I thought the Pratt Whitney worked on gears.

I genuinely may be wrong since it's years ago that rock creek was explaining it to me. I was asking how much gain the default was for their barrels and they offered that they could add gain but there would always be a bit due to how the machine worked. Maybe it wasn't a Pratt….

I know Bart has been offering gains for ages, and I've talked about it some with them so maybe they have the same machines or maybe they are doing it a different way. Speaking of Bart, surprised proof isn't also touting the left hand twist that Bart was running for people years ago for recoil control

 

[Phil Rizzo]

I hope these don't have tight spots…

 

[KonoctisWigwam]

I genuinely may be wrong since it's years ago that rock creek was explaining it to me.

I think it's certainly possible for the PW to be pulled while it's drilling, adding to the revolution, but that it won't be noticeable for the average shooter.

It may work out to be a better solution to recoil than any of us know.

I know Bart has been offering gains for ages

Prior to CNC? That would basically be a PW rifling machine. I don't see how that can be controlled. No worries, CNCs are dime a dozen these days.

 

[Kimber7man]

Remember when Bartlein stated 50% more barrel life from the MOD BB400 or whatever it is? Pepperidge Farms remembers.

Have you experienced their claim to be less than 50%?

 

[Phil Rizzo]

Have you experienced their claim to be less than 50%?

I was going to ask about this earlier…"Frank said blah blah" got me thinking.!

 

[stazmania]

I think it's certainly possible for the PW to be pulled while it's drilling, adding to the revolution, but that it won't be noticeable for the average shooter.

It may work out to be a better solution to recoil than any of us know.


Prior to CNC? That would basically be a PW rifling machine. I don't see how that can be controlled. No worries, CNCs are dime a dozen these days.

Here is how I think these barrels are cut or something similar using ECM. This also shows the innovation that will improve barrels over time.

ECM Rifling: Discussion with Carbon Six/McGowen (In-Depth) – Ultimate Reloader

ultimatereloader.com

 

[Rifleman97]

I'll put here what I put in the other thread too.

I emailed proof and they will be offering it in regular steel blanks as well in the coming weeks.

They have a 7BC with somewhere around 5000 rounds through it that did a 10 round group at .7" after all those rounds through it. They also only measured something like .010 throat degradation after something like 1000 rounds, which is pretty impressive as well.

If the steel prices are not too high I will likely be buying one to try on a 7-300 NMI. If not, I'll stick with Bartlein and CRB barrels

 

[bultinkle]

I think it's certainly possible for the PW to be pulled while it's drilling, adding to the revolution, but that it won't be noticeable for the average shooter.

It may work out to be a better solution to recoil than any of us know.


Prior to CNC? That would basically be a PW rifling machine. I don't see how that can be controlled. No worries, CNCs are dime a dozen these days.

Rock im almost positive was not using a cnc for cut rifling at that time, Bart I doubt as well but maybe?

Might be fun to Call them and ask? both told me they could put a heavy gain on it if I wanted, and world was my oyster if I could wait on a custom order. Rock is who told me their equipment will always have a bit of gain naturally.

 

[stazmania]

The parts I will be curious to see are the design/sty.e of the rifling, The bore diameter/groove depth and whether it is progressive, as well as the displace metal on the bullet as the rate of twist gain will basically encompass the entire circumference of the projectile. What will this do to cup and core jacket integrity, especially with the cartridges that will benefit most the high velocity high rpm cartridges. Logic would tell you there should also be an ability to gain velocity unless the displacement of jacket material create enough drag to offset any gains. It will be interesting to see as barrels get tested. Or if proof address how they addressed these things if they where even an issue. I am looking forward to learning more.

 

[22250imp]

I have a gain twist on my 6.5 PRC and it's working out well.

 

[Bob Wright]

Muzzleloader barrels have had gain twist options before CNC machines, so it's not new at all on that feature.