26 Nosler????? !!!!!

[gunners]

Chrono is good as when I load the 71gr H570 with the 160gr PPSN it is very close to the speed the Hornady No. 20 manual states. Book says 3067 fps and I get 3095 fps with a 30 inch barrel to get the 3261 I am using 73 grains H570.

Very slightly altered retumbo data plus COAL, case capacity + 2gr for fired case can match up to book velocity for h570 @71 gr and your 30 inch barrel and safe pressure, moving to 73 gr I can only get 3161@65,500psi through playing with quick load. Whether you can gain 100 fps through a fast barrel I just don't know, otherwise you will indeed be pushing 80k to reach 3261fps. If I had a couple more data points we'd know for sure as well as actual case capacity and COAL. Pm me if you want to know

 

[gunners]

That burn rate chart including h570 is a big help, it's now quite plausible you could see that velocity and be below 70,000psi
I get 3,251fps @68,838psi off altered IMR 7828 based on those 2 chrono readings that would be flat primer and ejector mark territory

 

[264WM]

I am trying to attach scanned pages from my Hodgdon NO. 20 Load manual so you can see the load data for the H570 Powder and how the 264wm, compares with the 7mm RM. And yes you are right on the flattened primer and extractor mark so I am hoping to back off enough to loose the signs of pressure and still be near 3200fps.

 

[Jokostel]

I am trying to attach scanned pages from my Hodgdon NO. 20 Load manual so you can see the load data for the H570 Powder and how the 264wm, compares with the 7mm RM. And yes you are right on the flattened primer and extractor mark so I am hoping to back off enough to loose the signs of pressure and still be near 3200fps.

The signs you see don't start happening till you pass about 70k.
Some folks don't care as brass is a consumable.
I'm giving ya **** because I don't want to see someone eat a bolt for lunch.
In all honesty, I'm surprised that the 570 is still good. Your powder magazine practices must be pretty **** solid.

 

[264WM]

The signs you see don't start happening till you pass about 70k.
Some folks don't care as brass is a consumable.
I'm giving ya **** because I don't want to see someone eat a bolt for lunch.
In all honesty, I'm surprised that the 570 is still good. Your powder magazine practices must be pretty **** solid.

Thanks for the concern my rifle is a Remington 721 I purchased in 1963 and replaced the original barrel with a new Shilen 30 inch 1 in 8 twist with 6 groves barrel in 2010 The action is plenty strong so I am not concerned on eating a bolt. The 160gr bullet is the only bullet I have ever flattened the primer and had extractor marks with. I have the JLK 130gr VLD bullet at 3249 fps with 67gr of H4831 and no pressure signs. Also have Sierra 85gr HP at 3830 fps with 73gr H4831 with no pressure signs and this shoots a 3 shot dime size group at 100 yards.

 

[65WSM]

I have shot the 160 Woody and 160 Sierra Semi-pointed (no longer produced) in my 28 inch Highwall (6.5 WSM). VV N-570 got me to just under 3000 fps with comfort and tight primer pockets. I fired some at above 3000 fps and the primers dropped out.

If the 160 gr bullet at 3030 from a 24 inch 7mm Rem Mag is a 350 yard elk cartridge? The 160 gr bullets from a large capacity 6.5 should be its equal. I tell people that the 6.5 WSM may not have the range of a 7mm Mag with 160 gr bullets but it will do everything with 160 gr bullets that the .280 Ackley will.

When I had a brace of Model 70s in .264 Win, I would have been very happy to see VV N-570, R-26, Norma 217 or even Retumbo. The best I had to work with was R-22 and MRP. H-870 never did as well as the Hodgdon data suggested. I even tried duplex loads to light it off.

 

[264WM]

Matrix is making a 6.5 160gr VLD bullet that should be a great long range bullet. Here is a link to it. Its at the bottom of the page.
.264 Caliber Bullets Custom Built for Accuracy | Matrix Ballistics

 

[Swamplord]

264WM


WOW ! that H570 powder has insane shelf life, they don't make 'em like they used to I guess,
It hasn't been manufactured in over 35 years and apparently still works , freakin awesome !

I have a small collection of old manuals and could only find the H570 in two of them, Hodgdons #23 from 1977 and the Reloaders Guide by R.A. Steindler from 1965, my copy is the 1975 printing....

According to some on the web, H570 was a surplus powder originally used for the 50 BMG and/or 20mm guns, super slow powder for the era, Burning rate is somewhere around H1000 , the 30'06 loads in the manual were pretty anemic compared to 4831, way too slow for that case and bullet diameter, but in larger cases with smaller diameter bullets it worked ....

Thanks for initiating the nudge in researching the powder, not much on the web about it but enough to learn what it was and it's place back in the day,

made ya some snapshots of relevant pages out of the books I have, love the old stuff !

 

[264WM]

264WM


WOW ! that H570 powder has insane shelf life, they don't make 'em like they used to I guess,
It hasn't been manufactured in over 35 years and apparently still works , freakin awesome !

I have a small collection of old manuals and could only find the H570 in two of them, Hodgdons #23 from 1977 and the Reloaders Guide by R.A. Steindler from 1965, my copy is the 1975 printing....

According to some on the web, H570 was a surplus powder originally used for the 50 BMG and/or 20mm guns, super slow powder for the era, Burning rate is somewhere around H1000 , the 30'06 loads in the manual were pretty anemic compared to 4831, way too slow for that case and bullet diameter, but in larger cases with smaller diameter bullets it worked ....

Thanks for initiating the nudge in researching the powder, not much on the web about it but enough to learn what it was and it's place back in the day,

made ya some snapshots of relevant pages out of the books I have, love the old stuff !

I have 3 of the 1 pound tin top cardboard sides cans that a friend gave me and the price sticker is still on the can which is $1.66 the only bad thing is he wants the containers back. It appears that they backed of on the loads from the No. 20 to the No. 23 manual. The No. 20 manual does not have a date. The old stuff is fun to read and one can see the evolution of the way they changed max loads over the years.

 

[Jokostel]

I bet that stuff would be fairly close to rl33... nipping at the heels of RL50.
Just think of what a 26 Nos would do with that...lolgun)

 

[WildRose]

Like I said the Hodgdon NO. 20 Manual has the Hornady 160gr round nose at 3067 fps with 71gr H570 in the 264wm and I could care less about the 7mm Rem Mag bigger dia equals more pressure.

No, you need to review physics.

All else being equal larger diameter equals lower pressure because you have the same reaction ocurring in an area of larger volume.

You cannot push the 160gr pill at those speeds in a .264wm.

Well, you might be able to do it once or twice but after that you will be at the nearest trauma center.

 

[264WM]

No, you need to review physics.

All else being equal larger diameter equals lower pressure because you have the same reaction ocurring in an area of larger volume.

You cannot push the 160gr pill at those speeds in a .264wm.

Well, you might be able to do it once or twice but after that you will be at the nearest trauma center.

That was a 3 shot average. I just got the calibers backwards you are right on the physics. But never say can't or someone will always prove you wrong. But then I am not trying to prove anyone wrong just developing a load I like. Like I said I will back off the load until I loose the pressure signs. Hopefully I will be near 3200 fps when that happens. The bolt opens easy at 3261fps just need to loose the extractor mark and not flatten the primer and good to go. My best guess is back off from 73gr to 72.25 gr which should get me close to 3200 fps.

 

[marioq]

No, you need to review physics.

All else being equal larger diameter equals lower pressure because you have the same reaction ocurring in an area of larger volume.

You cannot push the 160gr pill at those speeds in a .264wm.

Well, you might be able to do it once or twice but after that you will be at the nearest trauma center.

Short and sweet. That is the wild one!!!! He makes. A great point that the others here have made as well. Bottom line pressure makes velocity. Too much pressure makes for a bad day!!!!

 

[MASH]

So just got a box of the new Hornady ELD X 6.5, anybody tried these in there 26 yet?