Which powder

[OldBearHair]

I am asking for help with two powders: Alliant Select and Alliant Steel. And the possibility of using them to load for 350 Legend. I had problems with finding ammo, and load data for the said rifle. I do have 1/2 lb H110 powder. Alliant Select is # 16 on the slow to fast chart (Titegroup #15 Bullseye # 13 ). Alliant Steel is #60 on the chart ( 296 #65, Imr 4227 #66, H110 #64. I have Select and Steel powders on hand.
Next, I needed boolits. Built a boolit mold , three boolit cherries, .358, .357, push through dies and came up with a 170 gr. boolit. I have worked up loads for the boolit using H110. Hodgdons has data for H110. The SWC Lee 150 gr. boolit will not feed. I OBH (me)/Beagled the mold (longer nose) to 170 grains.
Next, I proceeded to download pictures from my analog phone (TMobile ) and I get the message that my phone is locked. Talked to TMobile and they say it is not locked except for TMobile service. Working on the problem . but, no pictures. Picture are stored on a sim card. I will try removing the sim card and plug in to the PC. Any and all suggestions will be appreciated,Thanks

[OldBearHair]

Should no one post should I say BUMP?

[Krag 1901]

I have no opinion on the legend as I just shoot .308 and .30-40 Krag, but didn't want you to think no one reads this.
You might check the recommended loads for .357 Max as they are very similar.

[OldBearHair]

Thank you kindly Krag 1901.

[OBXPilgrim]

Might help to tell what kind of rifle you have. There are bolt guns and AR's (rifle and pistol) in 350 Legend. While I'm sure some loads could be developed for either powder, they may not work at all in cycling the action in an AR. The Alliant Steel will probably get you some higher velocities than the Select, but neither may be what you really want. You looking for plinking loads or deer hunting loads?

[OldBearHair]

AR 350 Legend 15 inch barrel 1 - 14 twist. First shot with the cast boolit with 2 gr under min Hodgdon load for the boolit with H110 was 2219 fps. No pressure signs. Want the fps to be 1950 to 2000 fps. The rifle had some problems going to battery when releasing the bolt. Then it ran OK and locked open on empty. If I can only get 1800 fps and still function I would be OK with that. Mostly looking to kill pigs. The boolit is 170 gr. roof lead with 2% tin added with gas check. No leading. I got the chance to buy the Select and the Steel powder and after looking at their places in the slow to fast chart brought them home. The Steel powder is the one that I would like to see some data for the 350 legend. I really wonder if a pig could tell the difference being shot with a boolit at 1750 fps or 2000 fps. And I have not seen any keyholing, but some 12 inch groups above 2000 fps. I am after accuracy more than fast. Thanks for the input/

[Norske]

350 Legend data is becoming common. Check powder makers' websites for data. If there is none for your powders, those may not be appropriate.

[P Flados]

Back in 2014, it looks like folks were trying to use Steel for magnum handgun loads

https://castboolits.gunloads.com/sho...-Alliant-Steel

It looks like the burn rate is between Blue Dot and 2400.

This is on the fast side for the 350L, but might work since you are looking for less than max velocity.

The bad news is that there is zero load data for Steel or Blue Dot in the 350L and the powder is not in Quickload.

Fortunately for you, the 350L is rated for 55,000 psi and ARs seem to be able to handle loads that will flatten primers. One word of caution is that some 350L brass (Starline) may not be fully supported in all ARs.

Just out of curiosity, I did a Quickload run with Blue Dot and a Lyman 168 cast bullet. This combined with the 2014 thread results might give you a clue on how to use your Steel in the 350L.

Cartridge          : .350 Legend (SAAMI)
Bullet             : .357, 168, LYM LSWC 358429
Useable Case Capaci: 30.007 grain H2O = 1.948 cm³
Cartridge O.A.L. L6: 2.222 inch = 56.44 mm
Barrel Length      : 15.0 inch = 381.0 mm
Powder             : Alliant BLUE DOT

Step    Fill. Charge   Vel.  Energy   Pmax   Pmuz  Prop.Burnt B_Time
 %       %    Grains   fps   ft.lbs    psi    psi      %        ms

-10.5   75    17.00   1838    1260   33905   3894    100.0    1.013
-09.5   76    17.20   1853    1281   34814   3925    100.0    1.001
-08.4   77    17.40   1868    1302   35741   3955    100.0    0.990
-07.4   78    17.60   1883    1323   36685   3985    100.0    0.979
-06.3   79    17.80   1898    1344   37647   4016    100.0    0.968
-05.3   80    18.00   1912    1364   38627   4046    100.0    0.958
-04.2   81    18.20   1927    1385   39625   4076    100.0    0.947
-03.2   82    18.40   1941    1406   40642   4106    100.0    0.937
-02.1   83    18.60   1956    1427   41678   4135    100.0    0.927
-01.1   83    18.80   1970    1448   42733   4165    100.0    0.918
+00.0   84    19.00   1984    1469   43808   4194    100.0    0.908
+01.1   85    19.20   1998    1490   44903   4224    100.0    0.899
+02.1   86    19.40   2012    1511   46019   4253    100.0    0.890
+03.2   87    19.60   2026    1532   47155   4282    100.0    0.881  ! Near Maximum !
+04.2   88    19.80   2040    1553   48312   4311    100.0    0.873  ! Near Maximum !
+05.3   89    20.00   2054    1574   49491   4340    100.0    0.864  ! Near Maximum !

[OldBearHair]

Thank you P Flados Great information. About the ability for ARs for flattened primers and high pressures, I bought some "once fired" 350 brass with a mixture of manufacturers and saw flattened primers, ejector marks and the unsupported feed ramp bulges in the brass. Haven't checked the primers as yet to see if they are too big. May just glue examples of this brass onto a big "Warning" board and display in the reloading room.
Loaded four rounds of 160 gr lead with under min. H110 sized to 3567 and tested. Not good enough 2 1/2 inches at 40 yards. More ladder tests needed and later testing for the 190 gr and 220 grain boolits.

[mulespurs]

Just from my house, I bought an 18" 350 legend barrel from Midway last summer and installed it on a donor AR.

I bought the once fired brass as you did and had issues loading untill I swaged the primer pockets as you would on military brass. I bought the Lee 200 gr mold and powder coated and loaded with 21 gr H110. I sized in a push thru sizer to .356"

I needed a loaded case checker to refine my die settings and for predictable functioning. It seems to shoot pretty well.

I did find that a sample of new starline brass was thinner in the neck and would be easier to chamber, and would not have to fight primer pockets. If I get any more brass it will be starline.

I did harvest a 150 class whiretail buck at 200 steps with the above loads. Hi shoulder shot, took him completely off his feet. There is a picure of him on here somewhere.

My buddy used some of my bullets and shot 2 seperate 3/4" groups at 100 yds out of a Ruger american with N110 loads.
I am having fun with the cartridge

[P Flados]

While working with a 350L for an AR, any loader should inspect cases and avoid using stuff with shorter webs during load workups. Save the short web brass for proven loads that are not hot. And I believe that Starline is the most likely to have short webs.

The easy way to measure the web is to take a 5/16 dowel (or wooden pencil), cut it to be just longer than the brass, insert and measure the dowel + web. Subtract dowel length and you have web height.

And yes, reports of "excessive pressure" indications seems to be common with factory 350L ammo. The fact that so much of the factory stuff is hot, but failures are so rare indicates guns seem to have plenty of strength margin.

[Wayne Smith]

If you have brass with two web heights you have two different cartridges! You will have higher pressure in the taller web height (less case capacity, less expansion room in the case). Keep cases sorted and load for the smallest capacity case.