7 STW vs 28 Nosler vs 7 RUM according to Nosler's #8 reloading book

[MudRunner2005]

Maybe I'm missing something but won't any action that will fir a 28 will fit a STW or Ultra. At least in Remington, Savage, Weatherby, or Winchester???

Yep. The STW is thinner in diameter than the .28 Nosler or RUM, but the actions do work. One of my STW's is built off an old CDL 7RUM action.

When going from a standard belted magnum to a RUM/Nosler cartridge, you'll need to open the feed rails slightly to accept the wider cartridges.

 

[Bodywerks]

Maybe I'm missing something but won't any action that will fir a 28 will fit a STW or Ultra. At least in Remington, Savage, Weatherby, or Winchester???

Not if you want to feed them through a magazine. The stw you might get to run loaded at max saami length of 3.6" for any bullet. And you wouldn't be able to run the new 195's. I'd also imagine you'd end up with a lot of bullet jump with a standard reamer. Sane goes for the RUM, plus magazines would have to be significantly tweaked to work.
My biggest issue would be not being able to run mybullets to the lands or close, as that's where I generally find my accuracy loads.

 

[MudRunner2005]

Not if you want to feed them through a magazine. The stw you might get to run loaded at max saami length of 3.6" for any bullet. And you wouldn't be able to run the new 195's. I'd also imagine you'd end up with a lot of bullet jump with a standard reamer. Sane goes for the RUM, plus magazines would have to be significantly tweaked to work.
My biggest issue would be not being able to run mybullets to the lands or close, as that's where I generally find my accuracy loads.

Not positive, but I don't think he's talking about length... Most companies offer 2 length actions, long and short. Standard, Mag, or RUM is usually only a difference in feed rail and mag box widths and not action lengths.

If he buys a 700, he can always have a Wyatt's extended mag box installed to compensate for the longer cases. I believe he's talking about fit, as in width of the cartridges feeding from the mag.

 

[Shumba]

How much powder space is lost when shooting 195's from an aic mag? I would think it's significant.

I you are using the 338 Lapua AI Mag no space is lost. The lapua mag allows the 195 bergers to be seated with the boattail junction to be at the case neck/shoulder junction, and obviously the rifle would have to be chambered accordingly.

As far as the velocity comparisons between the 3 cartridges, I have not had a 7RUM or a 7STW so I have no facts on those two. The 28 nosler I have with a 29" barrel and long throated chamber will surpass the 3200 mark with 88.5g RL 33. While that is not the most vertically consitient in ladder tests, I run a mild 87g RL 33 at 3160fps. 88g does not leave ejector marks and no case head expansion, there is some of both on some of the 88.5 g loads. ES is less than 10 fps regardless of powder charge from 86-88.5g. Not sure how this compares to the other 2 from an experience standpoint but from what I have read here the 28 Nosler (with a long throat and heavy bullets) appears to be more efficient. Velocities taken with Oehler 35P and Labradar.

 

[Frank7mm]

Not positive, but I don't think he's talking about length... Most companies offer 2 length actions, long and short. Standard, Mag, or RUM is usually only a difference in feed rail and mag box widths and not action lengths.

If he buys a 700, he can always have a Wyatt's extended mag box installed to compensate for the longer cases. I believe he's talking about fit, as in width of the cartridges feeding from the mag.

Thanks MudRunner,

I here of many 28 being built with a COAL of 3.7"ish. Then brag about the velocity they are getting. Here is no denying that Noslers data is ****. If paying the price for a custom 28 or a custom RUM were my options, go with a RUM and have a short throat or a Wyatt's box like Mudrunner said. Most people are looking for performance and when you look at the data that inspired this thread, it is as clear as Hillary's agenda. LOL

 

[Bodywerks]

Only reason I went 28 nosler is because I'm a fan of savage rifles, in that the actions are more true out of the box and the bolts, bolt handles, and trigger groups are easier-to-modify DIY units. The Wyatt's box wasn't an option for me, obviously, and I want a detachable magazine. And savage already offers a rifle in a stock I can work with - the hs precision.
I suppose I could have gone the 338 lapua route to get more mag length and gone with the 7 RUM, but at an additional $400ish expense and I'd have to change the bolt face.
I love the 7 RUM, it's a laser. It's just not practical for my particular application.

 

[MATADOR48]

More Nosler hype and BS. They never use apples to apples comparisons.

 

[Stgraves260]

I was looking at the load data in Nosler's reloading guide #8. I studied the performance of the 7 STW, 28 Nosler and 7 RUM with 168 gr bullets.

I find it interesting that Nosler shows both the 7 STW and 28 Nosler cartridges with max load of 80 gr with H1000. The test barrel of the 7 STW is 24'' while the 28 Nosler is 26''. Velocities are 3093 fps and 3183 fps respectively.

Even more interesting is the case capacity comparisons which I found in a online article from Shooting Times: Ammo Review: The New .28 Nosler - Shooting Times

''When filled to the brim, the .28 Nosler case holds 100.7 grains of water versus 99.6 grains for 7mm STW cases made by Remington and 100.2 grains for those from Federal.'' To me these are virtually the same case capacities.

I guess Nosler has to show their cartridge is superior to the 7 STW by using a shorter 24'' barrel for the 7 STW. This is about as close to an apples vs apples comparison as you will find in their book.

From there on the 28 Nosler blows the 7 STW away by using US 869, RL-33, and RL-50 POWDERS THEY DON'T USE WITH THE STW!



Move to the larger 7 RUM and again the 28 Nosler wins by virtue of different powders used. At least they used the same 26'' barrel length.

I will concede that the 168 gr bullet may not be the top choice for any of these cartridges unless you are running a twist slower than 1 in 9.25 or so. Regardless of that fact, the only powders used with the 7 RUM are H1000, 7828 SSC, and Magnum while Nosler uses 11 powders. Too many to list but I did list the ones that yielded the fastest velocities.

The fastest the 7 RUM sends the 168 shown in the book is 3127 fps, while the 28 Nosler shows 3251 fps.

I hope a few of you found this interesting.

Very interesting. Thank you. I have a Rem 7 Mag Sendero w/ 26" barrel. I shoot 168 grain Berger bullets at 3265 FPS I use Retumbo powder. I was at a gun range in Texas called TacPro. I man there had a chronograph testing his 7RUM with the 195 grain Berger's. He was getting just under 3250 FPS. 26" barrel. I can't remember what brand it was though.

 

[TwoMore]

this is a pretty old thread but wow those are some fast barrels, my 7 RM is shooting the 168 around 3080 with a 28 inch Kreiger, and my 7 ultra rogue (RUM AI) with a 30 inch barrel is running just north of 3200 with the 195, now the rogue will spit the 168 out at 3420 but the throat is set up for the 195

 

[Stgraves260]

I've had 2 cronies on it but they didn't agree with each other. I used the FPS from both at 12" target I was shooting at a grand. I couldn't hit the target. I have a G7 range finder if you know what that is. It calculates for everything to keep it simple. I kept bumping the FPS up on the range finder and I started hitting the target. Berger states the BC on their 168 VLDs at .617. So after the final validation of 3265 FPS I was hitting the 12" targets out to 1000 yards. I shot some at 400, 500, 700 yards also. I have a Berger, Hornady, Nosler and Hodgdon reloading books I use. I no I'm over max charge but I'm not seeing any pressure signs. I have a vias 2" break on it and I know they bump FPS up regardless of what people say. I know the break don't add that much but my elevation turret matches my ballistics calculator and my G7 range finder. It's good enough to hold a 6" 5 shot group at a grand. I know it's not as good as some people or my 260 Rem. But it's a stock Rem Sendero. I just have the break on it in a MDT Chassis. I don't see my 7 Mag able to do these velocities. But the only other way to get me on target is 2750 FPS and a BC set at almost .800 BCs. I doubt 168 grain Berger's are anywhere near .800 BC.

 

[Stgraves260]

 

[Stgraves260]

260 Rem up top. 7Mag bottom.

 

[cape cove]

this is a pretty old thread but wow those are some fast barrels, my 7 RM is shooting the 168 around 3080 with a 28 inch Kreiger, and my 7 ultra rogue (RUM AI) with a 30 inch barrel is running just north of 3200 with the 195, now the rogue will spit the 168 out at 3420 but the throat is set up for the 195

I agree. I done a lot of load developement for my son's 7 RUM and I couldn't get 3250 with a 175 gr bullet in his 26" barrel.

 

[Don A Parsons]

Dang Namit you guys,,, just quit with this high speed critter getter cartridges... Ha...

Its bad enough that I dream about the old school 7mm Remington Mag cartridge,,, then here you guys dash my future plans with super high velocities and goobs or Punch-Junk down range... LOL

Next thing I know I'm going to end up buying a used 300 Weatherby Mag to play the game once again...

Hard on my wallet you guys are...

Sad indeed... Ha