quickload request for 458 socom with RL 7

[sl0re10]

can anyone do a quickload run on 458 socom with reloader 7
Starline brass
CCI 350 primer
Remington 300 gr. JHP
2.05 col

I'm looking for powder burn estimations mainly (if quickload estimates that). Trying to see if a few grains under max might help alleviate it. At 42 grains I have a lot of unburned powder.

PS
I wanted to post an update and thanks on my seating depth problem with 458 but the thread was too old. Thanks everyone. Everyone's suggestions were right. I had bullet stretch, the seating stem on the redding was not optimal to protect against it, and if a recipe change can't help with unburned powder with RL 7 I will probably need a seperate crimp die.

[Whiterabbit]

FYI the FIRST thing I do when using QL is model a known load to see if it makes sense. If the model is crap, so are your conclusions. Since I have no data to confirm the model is good, I have to accept QL with blind faith. That's a dangerous thing to do.

data attached.

[Whiterabbit]

I see I left hte barrel on the previous setting.

For a 16" barrel, drop powder burn efficiency from 3-6%.

[ar15barrels]

I see I left hte barrel on the previous setting.

For a 16" barrel, drop powder burn efficiency from 3-6%.

It takes 30 seconds to go fix the barrel length.
Then copy the output and past it between code tags.
MUCH cleaner than screen capturing.

[Whiterabbit]

Thanks for the tip.

[God Bless America]

What is "bullet stretch"?

[sl0re10]

What is "bullet stretch"?

bullet gets longer when seating.

I had it in two different ways. Trying to force it in while also doing a really heavy crimp made the body of the bullet longer and some of the top flowed in through the seating stem gap rather that just being pushed down by the seating stem. So; I kept not seating along the cannelure because the bullet was being deformed / changing size and not really getting pushed down by the seating die (just making a ring around where it was being pushed on the bullet).

Since it looks like dropping the charge won't help with powder burn with reloader 7... I'll probably do the suggestion (from a old related thread) of making seating and crimp separate steps. A lee crimp die is only $13 for 458 socom...

[sl0re10]

FYI the FIRST thing I do when using QL is model a known load to see if it makes sense. If the model is crap, so are your conclusions. Since I have no data to confirm the model is good, I have to accept QL with blind faith. That's a dangerous thing to do.

data attached.

thanks. That answered my question.

[God Bless America]

OP you didn't ask this, but why not use 296?

BTW the factory crimp die is excellent.

[sl0re10]

OP you didn't ask this, but why not use 296?

BTW the factory crimp die is excellent.

Mostly because I have five pounds of RL7 left. After it is gone I'm open to 296 or H110. Is 296 working for you?

[God Bless America]

With barnes 300 gr., it performed as expected.

H322 worked but velocities lagged.

[ar15barrels]

Cartridge          : .458 Socom
Bullet             : .458, 300, Remington HP
Useable Case Capaci: 47.113 grain H2O = 3.059 cm³
Cartridge O.A.L. L6: 2.050 inch = 52.07 mm
Barrel Length      : 16.0 inch = 406.4 mm
Powder             : Alliant Reloder-7

Predicted data by increasing and decreasing the given charge,
incremented in steps of 2.0% of nominal charge.
CAUTION: Figures exceed maximum and minimum recommended loads !

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

-20.0   76    32.00   1435    1371   17338   3145     74.5    1.472
-18.0   78    32.80   1470    1439   18310   3264     75.8    1.436
-16.0   80    33.60   1505    1509   19341   3383     77.0    1.401
-14.0   82    34.40   1540    1580   20435   3502     78.3    1.366
-12.0   84    35.20   1576    1654   21597   3621     79.5    1.333
-10.0   86    36.00   1611    1730   22830   3739     80.7    1.301
-08.0   88    36.80   1647    1808   24140   3856     81.9    1.269
-06.0   89    37.60   1683    1887   25533   3972     83.0    1.239
-04.0   91    38.40   1719    1969   27012   4087     84.1    1.209
-02.0   93    39.20   1756    2053   28585   4201     85.2    1.180
+00.0   95    40.00   1792    2139   30244   4313     86.3    1.151  ! Near Maximum !
+02.0   97    40.80   1828    2227   31992   4423     87.3    1.123  ! Near Maximum !
+04.0   99    41.60   1865    2317   33839   4530     88.3    1.096  ! Near Maximum !
+06.0  101    42.40   1902    2409   35803   4636     89.2    1.070  !DANGEROUS LOAD-DO NOT USE!
+08.0  103    43.20   1939    2504   37894   4738     90.1    1.044  !DANGEROUS LOAD-DO NOT USE!
+10.0  105    44.00   1976    2600   40123   4838     91.0    1.018  !DANGEROUS LOAD-DO NOT USE!

[ar15barrels]

And here is a powder chooser pass for that bullet and OAL:

Cartridge          : .458 Socom
Bullet             : .458, 300, Remington HP
Useable Case Capaci: 47.113 grain H2O = 3.059 cm³
Cartridge O.A.L. L6: 2.050 inch = 52.07 mm
Barrel Length      : 16.0 inch = 406.4 mm

Predicted Data for Indicated Charges of the Following Powders.
Matching Maximum Pressure: 35000 psi, or 241 MPa
or a maximum loading ratio or filling of 102 %
These calculations refer to your specified settings in QuickLOAD 'Cartridge Dimensions' window.
C A U T I O N : any load listed can result in a powder charge that falls below minimum suggested
loads or exceeds maximum suggested loads as presented in current handloading manuals. Understand
that all of the listed powders can be unsuitable for the given combination of cartridge, bullet
and gun. Actual load order can vary, depending upon lot-to-lot powder and component variations.
USE ONLY FOR COMPARISON !

46 loads produced a Loading Ratio below user-defined minimum of 80%. These powders have been skipped.
Powder type          Filling/Loading Ratio  Charge    Charge   Vel. Prop.Burnt P max  P muzz  B_Time
                                      %     Grains    Gramm   fps     %       psi     psi    ms
---------------------------------  -----------------------------------------------------------------
Vihtavuori N125                     97.9     39.5     2.56    1910    95.3    35000    4529   1.064  !DANGEROUS LOAD-DO NOT USE!
Alliant Reloder-7                  100.1     42.1     2.73    1887    88.8    35000    4593   1.080  !DANGEROUS LOAD-DO NOT USE!
Hodgdon H4227                       93.9     37.3     2.42    1875    93.1    35000    4348   1.067  !DANGEROUS LOAD-DO NOT USE!
Vihtavuori N120                    102.0     40.4     2.62    1871    94.2    32591    4468   1.095  ! Near Maximum !
Vihtavuori N110                     88.5     32.6     2.11    1862    99.9    35000    3946   1.088  !DANGEROUS LOAD-DO NOT USE!
Norma 200                          102.0     43.3     2.81    1852    86.9    30319    4760   1.135  ! Near Maximum !
IMR 4227                            92.1     36.6     2.37    1849    91.9    35000    4201   1.076  !DANGEROUS LOAD-DO NOT USE!
Accurate 5744                       83.4     34.6     2.24    1849    89.7    35000    4343   1.085  !DANGEROUS LOAD-DO NOT USE!
Accurate 1680                       90.7     41.1     2.66    1848    84.2    35000    4357   1.083  !DANGEROUS LOAD-DO NOT USE!
IMR 4198                           102.0     39.7     2.57    1842    87.7    33289    4354   1.087  ! Near Maximum !
SNPE Vectan SP 10                  102.0     47.3     3.07    1841    77.6    32739    4610   1.098  ! Near Maximum !
Accurate 2200                       99.7     44.0     2.85    1838    78.8    35000    4358   1.082  !DANGEROUS LOAD-DO NOT USE!
Hodgdon H335                       102.0     48.3     3.13    1825    76.6    32730    4558   1.102  ! Near Maximum !
Hodgdon H4198                       98.9     40.3     2.61    1814    81.8    35000    4110   1.087  !DANGEROUS LOAD-DO NOT USE!

Vhit N110 looks like the clean-burning powder of choice.

[bubbapug1]

Over the last few years I've learned one thing.

Listen to randall.

[ar15barrels]

The dangeros vs near max comment is purely based on the pressure of the load vs the pressure of the cartridge that you specify in Quickload.
If you change the max pressure of the cartridge to be higher, you can make those messages disappear.