The 27 Nosler, it's official!

In my experience with the medium bores if you can get up to pressure with a compressed charge of imr 4350 they rock and roll. I have a ruger 22 inch 350 rem mag. 61 of w748 is 2670. Too small to run 4350 with a 35 bore. Regardless if you can compress the slowest burning powder that will work you usually get good results. If you can get it to pressure of course. I have a 300 weatherby with a 27 inch lilja. I use 90 of norma 217 with a 200 N partition. I have to use an electric razor to settle the powder. 3150
 
David Emerson said:
In my experience with the medium bores if you can get up to pressure with a compressed charge of imr 4350 they rock and roll. I have a ruger 22 inch 350 rem mag. 61 of w748 is 2670. Too small to run 4350 with a 35 bore. Regardless if you can compress the slowest burning powder that will work you usually get good results. If you can get it to pressure of course. I have a 300 weatherby with a 27 inch lilja. I use 90 of norma 217 with a 200 N partition. I have to use an electric razor to settle the powder. 3150
Click to expand...
I should have read more before I responded. In my mind you would have been faster with a slower powder. And recoil is subjective and individual. I met a woman in Africa that guided buffalo hunters with a 458. 5 ft 6 and a 125 pounds. I own a 7 1/2 pound browning 458 FN safari grade. That will REALLY get your attention:D
 
David Emerson said:
I read your inset. That looks about the same capacity as the Norma. I don't quite understand the slow velocities. Maybe too-fast a burn rate of powder and a short throat?
Click to expand...
Assuming you are referencing the Stomper, the disparity between the Stomper and the .358 Norma is 0.9188, meaning I'd take published Norma loads down by 8.12% to use them in the Stomper. To allow for safety, I'd load the Norma loads down by 10% to use in the Stomper. That may be why I was getting lower velovities than we'd normally expect to see. I do not remember the case capacity of a .358 Norma brass.

The .358 Sierra Stomper held 89.0 grains o' water to its mouth. I do not know the capacity of the .358 Norma. My Stomper is about as close to the .35 Newton as you can get today unless you take .375 Ruger cases and cold-form them with custom-made forming dies. Ben Syring at Hornady Manufacturing will design and make them for you.
 
Last edited:
nvschütze said:
Assuming you are referencing the Stomper, the disparity between the Stomper and the .358 Norma is 0.9188, meaning I'd take published Norma loads down by 8.12% to use them in the Stomper. To allow for safety, I'd load the Norma loads down by 10% to use in the Stomper. That may be why I was getting lower velovities than we'd normally expect to see. I do not remember the case capacity of a .358 Norma brass.
Click to expand...
The norma is a bit longer than the 338 win in the base to shoulder but is narrower than your case. The old old speer books showed 78 of imr 4350 for the norma with a 250 for 2880 in a 24. But newer books show only the midrate powders or soft loads for 4350. Lawyers. Personally I have never had a problem with compressed powder charges. But the books now treat it like poison. The 458 had trouble with heavily compressed charges of 748. The coating on the powder. It formed into a solid lump and became a squib charge. I truly think if you loaded it up with 4350 it would perform much better.
 
David Emerson said:
Generous of you.
Click to expand...
Cost me around $15,000. But I don't care. I've got another mildcat bouncing around in my head right now. It will be a 6.5mm, 2.1000 inches long and have a 23-degree shoulder angle. The length was chosen because a 300WSM is absolutely a short-action cartridge. The 6.5mm bore was chosen because it recoils a lot less than does a 180-grain, .30-caliber MatchKing with 65.0 to 70.0 grains of H-4831SC powder behind it. The 23-degree shoulder angle was chosen because there is a neck-turner with blades that come already cut to that angle. The shoulder diameter was chosen so as to get more toward the geometry of present-day cartridges and away from overly-tapered designs from the early 20th Century.

The action will be a stainless Zermatt Arms TL3 (left bolt, right ejection) with a stainless & fluted Hart barrel, all nicely nestled into a MagPul Pro 700 fully-ambidextrous chassis. Scope is most likely going to be a Gen 2 Vortex Viper PST in the 6-25X x 50mm flavor. Trigger is most likely going to be a Timney of some sort, set down to about 28 ounces to trip it.
 

Attachments

  • Dimensioned 6.5mm Croodmeer.JPG
    Dimensioned 6.5mm Croodmeer.JPG
    92.1 KB · Views: 210
  • MagPul Pro 700 chassis.JPG
    MagPul Pro 700 chassis.JPG
    27.5 KB · Views: 159
Last edited:
David Emerson said:
The norma is a bit longer than the 338 win in the base to shoulder but is narrower than your case. The old old speer books showed 78 of imr 4350 for the norma with a 250 for 2880 in a 24. But newer books show only the midrate powders or soft loads for 4350. Lawyers. Personally I have never had a problem with compressed powder charges. But the books now treat it like poison. The 458 had trouble with heavily compressed charges of 748. The coating on the powder. It formed into a solid lump and became a squib charge. I truly think if you loaded it up with 4350 it would perform much better.
Click to expand...
Maybe I was born in a cave but I just start light and keep going until I get some head expansion. .0005 to .001. That is all that particular brass will stand. Then your primer pockets. If they are getting loose after 4 or 5 back down a bit.
 
nvschütze said:
Cost me around $15,000. But I don't care. I've got another mildcat bouncing around in my head right now. It will be a 6.5mm, 2.1000 inches long and have a 23-degree shoulder angle. The length was chosen because a 300WSM is absolutely a short-action cartridge. The 6.5mm bore was chosen because it recoils a lot less than does a .30-caliber bullet with 65.0 to 70.0 grains of H-4831SC powder behind it. The 23-degree shoulder angle was chosen because there is a neck-turner with blades that come already cut to that angle. The shoulder diameter was chosen so as to get more toward the geometry of present-day cartridges and away from overly-tapered designs from the early 20th Century.

The action will be a Zermatt Arms TL3 (left bolt, right ejection) with a stainless Hart barrel, all nicely nestled into a MagPul Pro Series 700 ambidextrous chassis. Scope is most likely going to be a Gen 2 Vortex Viper PST in the 6-25X x 50mm flavor...
Click to expand...
 
David Emerson said:
Seems like it will be a nice gun and you will enjoy it.
Click to expand...
I'm anticipating it will be about as pretty as forty feet of mud fence. I don't care. If it's as ugly as Himmlery Rotten Klantoon but shoots 'em like David Tubb was behind the wheel, I'll be happy and no one will have any grounds upon which to make comments about its appearance. As we all know, the only interesting rifle is an accurate rifle...
 
Warning! This thread is more than 4 years ago old.
It's likely that no further discussion is required, in which case we recommend starting a new thread. If however you feel your response is required you can still do so.

Similar threads

M
Its now official. I HAVE joined the dark side.
Replies
12
Views
3K
Greyfox
Greyfox
R
27 Nosler
2
Replies
19
Views
17K
SnowDingo
S
kirkeb
27 nosler brass
2 3
Replies
31
Views
14K
Mcranch
M
Joel Russo
“CURTIS” Is The Official Action Of PRS, 2019
Replies
0
Views
1K
Joel Russo
Joel Russo
doug2080
27 nosler factory chamberings
Replies
0
Views
235
doug2080
doug2080

Recent Posts

Top