26 Nosler

[lancetkenyon]

I think the 26 Nosler shooting an annealed 160gr Matrix VLD with a G1 BC of .685 at about 3100fps. would be an amazing hunting rig. But still hard on barrels. Not too much harder than a 7LRM pushing 180 Berger VLDs with a G1 BC of .659 @ 3100fps.

I see very little difference in these two loads performance wise, with a slight advantage in all categories to the 26 Nosler over the 7LRM when loaded to it's potential. Both would be amazing for LR hunting applications. Both would suck as an often shot LR target cartridge. You can't tell me a 7LRM, with a case capacity and velocity almost identical or even slightly above a 7STW would have a long barrel life. Not significantly longer than a 26 Nosler with the 160 Matrix.

These are calculations using Strelok Pro, so they are close. You would have to shoot both and record data to get actual info.

@ 1500 AMSL (29.52 pressure), 59°F, 50% humidity, with a 200 yard zero:

Drop in inches, drop in mils, remaining velocity, remaining energy

@ muzzle:

26 Nosler= 0, 0, 3100fps, 3603ft/lbs

7LRM= 0, 0, 3100fps, 3603ft/lbs

 

@ 500 yards:
26 Nosler= -29.14", -1.6mil, 2588fps, 2499ft/lbs
7LRM= -29.53", -1.6mil, 2562fps, 2449ft/lbs

@ 1000 yards:
26 Nosler= -187.9", -5.2mil, 2125fps, 1686ft/lbs
7LRM= -191.5", -5.3mil, 2085fps,1622ft/lbs

@ 1500 yards:
26 Nosler= -542.1", -10.0mil, 1715fps, 1098ft/lbs
7LRM= -557.1", -10.3mil, 1665fps, 1035ft/lbs

@ 2000 yards:
26 Nosler= -1196.7", -16.6mil, 1371fps, 702ft/lbs
7LRM= -1241.7", -17.2mil, 1321fps, 651ft/lbs

[firstcoueswas80]

I don't recall saying the LRM would outrun the 26....

 

I can promise you, running that 180 Hybrid at less than 3000 fps extends that barrels life further than the 26.

 

Lance, could you run those same numbers, with the lrm using the .674 hybrid please.

[lancetkenyon]

What velocity do you want it run at? It will take me all of 5 minutes to look it up.

 

As for 7LRM velocities, I was going off Gunwerks loadings published data for reference.

 

Loading the 160 Matrix below 3000 would extend barrel life too. Speed X bearing surface = throat wear, regardless of chambering. I would love to have one of each though!!!

 

You never said the 7LRM would outrun the 26 Nosler, someone else claimed the 26 would match it in all but energy. With the 160 Matrix, it is almost identical. The 140gr. Berger VLD would be wicked fast, but drop off somewhere around 700-1000 I am betting. I did not run those numbers though.

[lancetkenyon]

7LRM with a 180 Berger Hybrid @ 3000fps (all other environmental factors the same as above):

 

@muzzle:

0, 0, 3000fps, 3375ft/lbs

 

@ 500 yards:

-31.4", -1.7mil, 2492fps, 2317ft/lbs

 

@ 1000 yards:

-203.0", -5.6mil, 2032fps, 1541ft/lbs

 

@ 1500 yards:

-588.6", -10.9mil, 1584fps, 990ft/lbs

 

@ 2000 yards

-1307.3", -18.2mil, 1299fps, 630ft/lbs

[firstcoueswas80]

Could you run it at 3100, like up above?

 

I run the hybrid at 2950, with 71 grains of Retumbo. Anything up above that shows pressure, plus accuracy was at 71 gr.

[firstcoueswas80]

Also, for what it's worth...

 

I just got of the phone with Gunwerks questioning about barrel life. Craig told me their shooting school rifles are lasting 2500-300 rounds.

[lancetkenyon]

@ 3100 fps

 

@ muzzle:

0, 0, 3100fps, 3603ft/lbs

 

@ 500 yards:

-29.22", -1.6mil, 2580fps, 2485ft/lbs

 

@ 1000:

-188.9", -5.2mil, 2111fps, 1664ft/lbs

 

@ 1500:

-546.8", -10.1mil, 1697fps, 1075ft/lbs

 

@ 2000:

-1211.6", -16.8mil, 1352fps, 682ft/lbs

 

And at 2950fps: (let me know how this compares to your true ballistics in the conditions I stated)

 

@ muzzle:

0, 0, 2950fps, 3246ft/lbs

 

@ 500:

-32.84", -1.8mil, 2440fps, 2222ft/lbs

 

@ 1000:

-211.9", -5.9mil, 1986fps, 1472ft/lbs

 

@ 1500:

-615", -11.4mil, 1589fps, 943ft/lbs

 

@ 2000:

-1367.8", -19.0mil, 1270fps, 602ft/lbs

[lancetkenyon]

Also, for what it's worth...

 

I just got of the phone with Gunwerks questioning about barrel life. Craig told me their shooting school rifles are lasting 2500-300 rounds.

That is amazing!!! I wonder if they load them down at all? I would say if they are loaded like their own data shows, and getting that barrel life out of them, a 7LRM will be on my short list of next rifle cartridges.

[firstcoueswas80]

That I can't answer for certain, but he said the sweet spot was between 2900 & 3100, I'd be willing to bet they run them as fast and flat as they can.

[firstcoueswas80]

Also, I don't do MIL, I do MOA. At 600 (150 yard zero), I dialed 10 MOA and was spot on, also using Strelok.

[lancetkenyon]

Just re-checked with a 150 yard zero and MOA, I came up with 9.49MOA @ 600 with the environmentals I quoted. Different temps, pressure, elevation, etc. could easily make .5MOA difference. That is only 3" @ 600 yards. Sounds like a great gun.

[STOMP442]

Also, for what it's worth...

 

I just got of the phone with Gunwerks questioning about barrel life. Craig told me their shooting school rifles are lasting 2500-300 rounds.

Are they nitriding the barrels?

 

So you are saying you see pressure at 2950 with the 180 hybrid and 71gr of powder. Safe in your rifle and accurate. I have a 6.5-06AI pushing 140s at 3180fps and 59gr of powder, safe and accurate in my rifle. My 6.5 has much less case capacity than the 26 offers but velocities are similar lets look at real world data and compare. Lance do your thing and run the numbers.

[willhunt4coues]

Thats why I like the Creedmoor. I am running 41.4 and 41.8 gn of H4350, 140 gn Berger and getting 2800 fps (fast enough for me) and a lot cheaper for reloading. I love the faster guns but I would be changing barrels every 6 months as much as I shoot.

[lancetkenyon]

OK, for Stomp442:

 

7LRM running 180 Berger Hybrids at .674 G1 BC & 2950fps VS. 6.5-06AI running 140 Berger VLD @ .612 G1 BC & 3180fps.

 

 

 

@ muzzle:

6.5-.06: 0, 0, 3180fps, 3143ft/lbs

7RLM: 0, 0, 2950fps, 3478ft/lbs

 

@ 500:

6.5-06: -30.20", -1.7mil, 2446fps, 1860ft/lbs

7LRM: -34.94", -1.9mil, 2311fps, 2136ft/lbs

 

@ 1000:

6.5-06: -208.2", -5.8mil, 1825fps, 1036ft/lbs

7LRM: -234.9", -6.5mil, 1763fps, 1243ft/lbs

 

@ 1500:

6.5-06: -656.5", -12.2mil, 1331fps, 551ft/lbs

7LRM: -722", -13.4mil, 1324fps, 700ft/lbs

 

@ 2000:

6.5-06: -1603.7", -22.3mil, 1038fps, 335ft/lbs

7LRM: -1713.4", -23.8mil, 1053fps, 443ft/lbs

 

Stomp...thanks a LOT. I thought my next build was mostly all planned out. Now you go and throw a wrench into it with your 6.5-06AI....PM me the rifle and load details please. Thanks.

[firstcoueswas80]

 

Also, for what it's worth...

 

I just got of the phone with Gunwerks questioning about barrel life. Craig told me their shooting school rifles are lasting 2500-300 rounds.

Are they nitriding the barrels?

 

So you are saying you see pressure at 2950 with the 180 hybrid and 71gr of powder. Safe in your rifle and accurate. I have a 6.5-06AI pushing 140s at 3180fps and 59gr of powder, safe and accurate in my rifle. My 6.5 has much less case capacity than the 26 offers but velocities are similar lets look at real world data and compare. Lance do your thing and run the numbers.

Slightly flattened primers, but no sticky bolt or extractor marks at 71gr Retumbo. But, at 73, very flat primers and sticky bolt. They use H1000, which I've actually yet to play around with.