I'm looking for data, experience with this powder.

I worked up a load for my 26 Nosler, 139 gr. Scenar over 79 gr. n-570, 3,320 fps, half inch groups at a hunderd. Burn rate is about right for this round. Vv powder, although expensive, is top notch.

I don't see much data on n-570, none for the Nos., mostly .338 Lapua, etc. I calculated my load based on comparables.

I checked with Pat (Scenarshooter) about the 139 gr. Scenar at 3,300+ fps. He's used it in his 6.5 SAUM's at 3,200 fps and said it should work well.

He mentioned a 135 gr. JLK bullet with .630 G1 B.C., said it worked well. I didn't get details on terminal performance, but it's probably good if Pat said it was good. And, I'm sure he takes terminal performance into consideration.

Any assistance with n-570 will be appreciated.

DF

Quick load shows n-570 as the top powder for velocity in the 26 Nosler. I wonder why Nosler hasn't included it in their data.

It's a double based coarse stick powder that won't meter. It just stacks up.

I remove the RCBS Uniflow drop tube, dump powder in a scale pan, tweak load on the scale.

Double base with extra Nitro makes it a high energy powder. It may burn hotter, cook barrels faster. Just guessing. So far, I'm liking what I see, great velocity and accuracy.

DF

I'm going to try 80 gr. n-570 with the 139 gr. Scenar.

Velocity could be around 3,350 fps. I'm wondering about the 139 gr. Scenar velocity performance window.

I used a 90 gr. Scenar at .240 Wby speeds on a WT. Bad result, way too expansive. Now that bullet may not be as tough as the 139 Scenar, but I'm not sure.

If anyone has experience running this bullet fast, I'd like to hear about it.

DF

Barrels are replaceable. Enjoy.

Yep...

My 26 Nosler Shilen SS barrel has about 500 rounds. It doesn't foul, was Dyna Bore Coated early on. Thru the Hawkeye, it does show some early throat erosion, blackness I can't get out, not nearly the "black top" road you see with advanced erosion. Compared to those, the throat is still pretty slick.

I'm guessing maybe a thousand rounds. It still shoots sub MOA and as long as it groups, I'll shoot it regardless what the Hawkeye shows.

I think my new favorite powder may be n-570, it had been US869 and WC872. I seem to get more speed from n-570 than the other two, which are virtual twins from my experience.

n-570 is just a lot more expensive, $50 a pound. Sometimes you find it in the $40+ range. You can get an 8# jug of WC872 for not a lot more than a pound of the Vihtavuori.

DF

Dirtfarmer,

I was excited until I saw your price. That price leaves me out.

Yeah, it's a bit pricey.

But, I don't use that much, got mine at a fairly good price considering.

Pull down Vulcan WC872 powder is the best deal, more bang for the buck.

Those big block 6.5's that you and I like aren't target rounds. I don't shoot mine that much. So, that's how I justify the price. The n-570 performance is that good, IMO.

DF

I've loaded increasing charges of n-570 with 120 gr. A-Frame and 130 gr. SSII's. Those are both tough bullets, the SSII has a much better B.C.

We'll see how they group and how fast they fly.

DF

Good luck with the experimentation DF, I have no exp w/ VV powders save the N-105 for pistols, it's very clean and uniform.

The 130 SSII ought to be a real barn burner on med game at those speeds.

gunner, I'm thinking around 3,400 fps with the 130 gr. SSII's. I've seen pictures of complete expansion at 3,300 fps, 3,400 may be pushing their design window. They are tough bullets, we'll see.

The 120 A-Frames are tough bullets, too. I think I can push them near 3,500 fps. with n-570. I'd probably be getting pressure signs with US869 before I reached 3,500; n-570 seems more efficient.

SSII's have a .571 B.C. vs. the A-Frame's .344. So, the 130's should be better way out there. But, I bet those 120's will smack the heck out of a hog...

DF

I just checked the Powder Valley web site. They have n-570 for $37.65, which isn't bad, considering $50+ retail.

DF

10-4, believe I'd run the 130's, guessing you know the A-Frames can get kinda sticky and drive up pressures.

I do, gunner, but think these 120's, being on the short side, should get "unsticky" pretty quick with a big enough kick in the britches.

These 120's have considerably less bearing surface than heavier, longer A-Frames. I know they are tough bullets, won't go to pieces when driven hard. I have mono's as back up if these don't perform.

I think 130 SSII's may be a better choice, almost twice the B.C.

Nothing ventured, nothing gained...

Another thought with the 26 Nos. I have a 3.6" box mag and was loading longer than factory COAL because I could. My current thinking, go with factory 3.34" COAL and let them jump. Some bullets like to jump and a touch of "freebore" may help smooth out pressure. Ole Roy taught us that...

DF

Interested in your results.

Yeah, me too...

I'm tied up with business this weekend, maybe next weekend if the weather cooperates, I'll have some answers.

DF

BTW, Welcome to the Fire...

DF

Thank you. I've been creeping for years and years. I'm working on my us869 127gr 26n load development currently and needed to dig a little deeper since there is so little data.

So far I'm averaging 3300fps with 88gr. I wanted to start low in case the rifle ran into pressure spike issues. Anyway now I'm sighted in. Not real happy with my initial Es/sd. Hopefully it lines out with a more compressed load. I know all my barnes loads tend to like being run hot for best accuracy.

Barnes like to run fast and jump.

What do you think of my latest revelation of going factory 3.34" COAL and letting them jump even more?

That just dawned on me and may help smooth out pressure with top end loads. Not sure, just a thought.

With the longer COAL loads, I was getting ejector marks and shiny bolt marks on case heads. I was w/i accepted load limits, not going rogue, with Fire style "creative" powder charges...

These loads are with new brass, so we'll see what the case heads look like.

DF

Could be worth experimenting depending on load density. In my experience I've never really had to stray from .050" jump. Everything shoots so good I haven't felt the need to mess with em. I loaded (x3) at 92, 91.5, 91, 90.5, and 90gr. Hopefully I'll get to test after work today. Coal I believe is 2.800 ogive to base and 3.39".

I have some quick load data on us869, retumbo, and h50bmg. I'll see how well my real world data stacks up. Quick load says us869 will only reach 3327fps with 91gr. I was really hoping to see 3450-3500.

In my 6.5RUMLN I ran .180" jump with the Barnes LRX 127 before they were accurate.

Yep, when Barnes don't shoot, increase the jump.

Sometimes the extra jump works miricles.

DF

Looks like I'll be trying it. Had some interesting velocity results tonight. Accuracy isn't fantastic.

Mine shoots 120 TTSX and 120 E-Tips more accurate than 127 LRX.

DF

Adjusted 3moa down after first group. And sorry for hijacking your thread, but I guess it is relevant. I'll likely be looking for a velocity bump and definitely better accuracy. Before I switch bullets I'd like to experiment with powders.



90.0gr
3369
3350
3378
Ave 3365
Es 28
Sd 14.3

90.5
3427
3345
3403
Ave 3391
Sd 42.1
Es 82

91.0
3432
3407
3385
Ave 3408
Es 47
Sd 23.5

91.5
3443
3408
3397
Ave 3416
Sd 24
Es 46

92
3438
3404
3460
Ave 3434
Es 56
Sd 28.2

No hijack, all good info.

DF

Update?

Very cool. I could be in for some of the N570 for my 264 Win.

DF, I would not sweat that 130 Scirroco one bit at 3400, you may get it to turn inside out and umbrella over the base but it'll hang together and retain a very good frontal area. I LOVE them to be honest. Consistently wider expansion than an Accubond.

Going to have to hit QL up and see what it shows for N570.. bet it is good. Seems about the same as RL33.

They like to jump. The 100's in my 25-06 are .125 off and really came around with the jump. Maybe more than a mono.









Increased the charge a .5 grain to get the speed back up after shortening them and shot this one.






Those were one shot readings over the Magnetospeed.

Just worked up a load for my buddy's newly barreled .270 Wby. With 7828 no problem pushing 130 NAB's at 3,400, no pressure issues and sub MOA.

Burning a lot more powder in the 26 Nosler, pushing 130's at 3,400.

I know, better B.C.'s with the 6.5, much better bullet selection. For LR target shooters and hunters, that may make a difference. For hunters shooting out to 500 or so, probably not.

Sorta took the wind out of my sails.

DF

It's all relative. Both are flatliners.

For the hunter ain't much you want for with a 130 at 3400 in either.

My little 270 WSM will put 130's down range in a hurry as well. For me there isn't much difference in any of them under 600.

.264 WM. 3400

That's pretty wicked. What sorta case life do you get at 3400?

The 270wby and wsm seem to be a much better way to get a 130 class bullet cruising.

http://www.doubletapammo.net/index.php?route=product/product&path=130_382&product_id=700

If we could make this reality, it'd be all worth it.

And, they don't give out recipes...

I can't keep up with them, reloading.

Oh well...

DF

I been pimping RL-33, using you as a reference.

Good stuff.

DF

The .264 is the only cartridge that RL-33 has worked well in for me

Seems to be an ideal match for that round.

Not as good, IME, in the 26 Nosler.

I'm still working with n-570, US869 and WC872.

DF

Still working with the 26 Nos.

The 140 NAB over 85 gr. WC872 shot .4" at 3,214 fps.

The 140 VLD over 88.5 gr. WC872 shot .56", didn't get speed, probably 3,250 or so. 3,100 is reportedly the design ceiling for Hunting VLD's, so I don't use them for hunting.

The 139 Scenar shot half inch over 79 gr. n-570 at 3,316, SD 32.

The 127 LRX over 91 gr. US869 shot over an inch at 3,446 fps., no signs of pressure. I've not gotten stellar accuracy from that bullet, may need to jump it more, adjust the load.

130 SSII over 80 gr. n-570 shot a fairly good group at around 3,400, but had hard bolt lift. The SSII has a very long shank, probably too much friction for that load.

120 gr. Swift A-Frame over 80 gr. n-570 shot an inch or better at 3,565. Good speed, average accuracy. Not a high B.C. bullet, may not use it.


So far, seems WC872 and US869 with 140 NAB/VLD's at 3,200+, 120 mono's, (TTSX/E-Tips) at 3,450 are best performers at half MOA. You add the 139 Scenar over 79 gr. n-570 at 3,300+ to the half MOA club. 139 Scenars also shoot good with 869 and 872.

I've yet to try 120 mono's over n-570. I'm thinking n-570 may outperform 869 and 872, at least QL thinks so. Fast doesn't mean accurate. Maybe I'll get a final combo before the barrel is toast...

At 500 rounds, maybe getting close to half way. I'll shoot it as long it'll go half MOA, regardless what the Hawkeye shows.

DF

Thanks for the update. Interested in the 127/570 load.

So far, not that impressed with the accuracy of the 127 gr. LRX.

I'm thinking 79-80 gr. n-570 should push it pretty fast. I'm going to jump it more and see.

I also want to try n-570 with the known performers, 120 gr. TTSX and E-Tip's.

139 gr. Scenars are easy to load for. Pat (Scenarshooter) thinks they'd work OK at 3,300+ fps. The 79 gr. n-570 load is promising, good speed, good accuracy and the 139 Scenar is a good LR bullet.

DF

I don't remember if I told you the jump on my large case 6.5mm, but accuracy came in at .180".

A friend here is using N570 and shooting the 140's at around 3500 in the 26 IIRC

I remember, thanks for reminding me.

DF

Rick,

I remember you posting that. QL shows a higher charge of n-570 than I think would work. I start seeing pressure signs before I get to some of the loads posted.

If you can get your friend's load and bullet(s) data, I would appreciate a PM, as there is no n-570 data for the 26 Nosler on line or anywhere. And you may not want to publish that on an open forum.

I even sent Nosler an email, stating that n-570 was the top QL 26 Nosler powder regarding velocity. Their comment, we have no data at the present time. Based on their published data, I don't think VihtaVuori is aware the 26 Nosler exists and I don't know how to call them. I don't see a U.S. number and I don't speak whatever they happen to speak...

As a high energy, double based powder, n-570 holds promise. So far, the best n-570 accuracy/speed combo has been 139 gr. Scenars as posted earlier.

Accumulating exhaustive 26 Nosler data would probably be at the cost of a barrel. That's why I like using info others have developed.

But, with a new powder, sometimes that's all one can do. Kinda like your efforts with RL-33. As I recall, you were a trail blazer, using RL-33 in the .264 WM. Seems there wasn't much data (as in none) when you started that project.

DF

Very interesting. I've been keeping my eye out for some n570 to try. Do you happen to have the QL data available. I'm curious what it shows for the barnes.

Someone else did the QL, I printed it.

I don't have a link to post. Maybe someone with QL could post that data.

DF

Powder Valley has n-570 for $37.65.

https://www.powdervalleyinc.com/

DF

Any more updates?

Unfortunately sidetracked with other projects.

One of these days.

DF

Anyone try this powder in 260 rem or 6.55 x 55 with 123 gr amax or 140 bergers?

Ive always used 4350

New data with good results. Close to the burnrate of the vv.

Reloader 33

81.5
3327
3279
3257
Ave 3287
Es 70
Sd 35.8

82
3306
3292
3307
Ave 3301
Es 15
Sd 8.4

82.5
3330
3340
3355
Ave 3341
Es 25
Sd 12.6

83
3369
3359
3371
Ave 3366
Es 12
Sd 6.4

83.5
3394
3385
3419
Ave 3399
Es 34
Sd 17.6

84
3413
3424
3432
Ave 3423
Es 19
Sd 9.5

85
3500
3556
3504
Ave 3521
Es 61
Sd 34.1

85.5
3529
3496
3542
Ave 3522
Es 46
Sd 23.7