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Post by coldtriggerfinger on Mar 31, 2019 1:24:01 GMT -5
Does anyone know what the cause of smokey cartridge necks is. ?
I started work up for a new rifle today with a starting load. The outside of the necks down to the shoulder was really sooty.
Any ideas ?
Thanks in advance
Glen.
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nicholst55
.375 Atomic
Retired, twice.
Posts: 1,038
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Post by nicholst55 on Mar 31, 2019 2:15:03 GMT -5
Too low chamber pressure to seal the case neck against the chamber wall. Bump up your powder charge.
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Post by coldtriggerfinger on Mar 31, 2019 3:29:55 GMT -5
Ok , Thank you.
The Hosts in book said this load should be producing around 44,000 psi. I'm suprised it takes more than that . But, that's OK.
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Post by magnumwheelman on Mar 31, 2019 8:42:17 GMT -5
If you think you are at 40,000 already, it may not be the best choice of powder or primer, or crimp... What cartridge??? & what components are you using... Normally 40,000 would be enough pressure
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Post by clintsfolly on Mar 31, 2019 10:08:16 GMT -5
May be hard brass and needs to be aneiled?
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Post by coldtriggerfinger on Mar 31, 2019 13:45:00 GMT -5
416 Rem mag . 350 gr moly tumbled Hawk Spitzer 35k jacket IMR8208 XBR
Remington brass.
Yes I should have annealed the brass.
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Post by coldtriggerfinger on Mar 31, 2019 14:06:14 GMT -5
Actually in the Hodgdon data it lists the pressure as CUP and the starting load of 71 gr produces 44,600 copper units of pressure.
Max is up in the 52 k cup range.
I don't want to go up into the max as I don't want to overspeed this bullet.
I just want something to blast with to begin getting used to this rifle. And that will knock a grizzly or moose down If it gets in the yard.
I've got lots of 416 Rem ammo loaded to max book. But I built these loads up in my previous 416 Rem. One I had built on a CZ550 magnum action with a stainless McGowan 1 in 10 twist barrel.
I had some 8208 on the shelf so I figured I would use it up. Same with the Hawk bullets.
But I'm still not fully settled on what my final load will be.
I'm debating on a pumpkin rolling 400 gr bullet @ 2250 fps . the 350 gr TTSX/TSX @ 2600 fps . Or kind of my favorite which is a 300 gr TSX@ over 2900 fps.
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dhd
.327 Meteor
Posts: 941 
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Post by dhd on Mar 31, 2019 14:23:56 GMT -5
As others have stated, anneal the necks if you have the tools.
I bought a Vertex when they started producing them and have never regretted the expense. I've even used it for 357, 44, and 45 Colt Starline brass and it does make a difference. Smokey brass doesn't happen around here.....
I originally purchased it for Black Powder Cartridge rifles as they can really smoke up a case if you have hard brass, which Starline is. Starline also happens to make the best brass for that application. Nickel plated is a PITA, but it can be annealed too (just in case that's what you have).
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Post by nolongcolt on Mar 31, 2019 14:30:38 GMT -5
I loaded some .350 Rem mag the other day with the only recommended powder in the Alliant manual, Reloder 7. Smokiest, dirtiest loads I have ever fired. No hang fires or such, just filthy. Wont bother with that again. Its a fast powder on most burn rate charts but it sure didn't act like one.
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Post by coldtriggerfinger on Mar 31, 2019 18:10:45 GMT -5
Yes. 8208 is a fast rifle powder also. The max book load in Hodgdon is only 77 gr. And it gives 2550 fps. Mot the fastest. But in the middle of the pack for powders listed. But some of them have a starting load of 10 gr more powder.
On the plus side of this Smokey load.
I took 3 quick shots at a spruce sapling 25 yards away. Offhand with Williams rear peep with the aperture taken out and tossed. And Firedot bead front sight.
I can cover the centers of the shots with the width of my thumb and they are zakly the same for verticle. First 3 shots I ever shot this rifle. Bang bang bang . didn't take 4 seconds to fire 3 shots total.
I am very happy with this rifle so far.
It's probably going to be my primary hunting and rambling rifle.
I just have a huge affection for the 416 Rem mag.
Next loads will be 2 gr more powder. With annealed brass.
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Post by coldtriggerfinger on Apr 1, 2019 20:56:18 GMT -5
I do have some 8 mm Rem mag nickel plated brass that I had to anneal prior to necking up.
Nice thing about necking up 8 mag and 375 H&H brass is . They never have to be trimmed.
Until I get a case annealer. I just use a propane torch and hold the brass in my fingers to rotate it in the flame. Then drop into a bowl of water. Art Alphin told me how to do it a long time ago when I was complaining about split necks on my 500 A-Sq brass.
I'll probably get an Anneal Ezz . I've thot about the Salt Bath method. But don't want to use that much electricity as we will be off grid. Solar/wind/gas generator.
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eskimo36
.375 Atomic
Oklahoma
Posts: 2,048
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Post by eskimo36 on Apr 2, 2019 7:09:41 GMT -5
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Post by magnumwheelman on Apr 2, 2019 7:23:36 GMT -5
The last cases I had to anneal, I put the cases in a cake pan 1/2 full of water, & heated the case mouths to a count ( 4 or 5 ) with a propane torch not adjusted to a fine blue point, then after the count, knocked the cases over in the water to cool... this was for 460 S&W cases, & I didn't want them getting too soft past the case mouths
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Post by coldtriggerfinger on Apr 3, 2019 1:22:33 GMT -5
That's a very nice looking annealer ! However it will have to wait till I build a house. |
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