Vithavuori for the 30-40

Ammunition, reloading, shooting, etc
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butlersrangers
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Re: Vithavuori for the 30-40

Post by butlersrangers »

'Donki' - It appears your last targets show better groups, but, the targets were also shot at 50 meters.
(I believe your earlier Range session was shot at 100 meters).

You may want to try increasing your charge of N160 powder to 41 or 42 grains, and compare results.

Since you also have N140 powder, a starting charge of 36 grains of that propellant is worth trying.
(Parashooter's calculations indicate N140 may be a better choice for .30-40 loads).

You are showing good technique, using the same Point Of Aim and shooting 5 shot groups, before altering sights.

Your Krag rifle appears promising, with a nice bore, and a potential to group shots.

I don't think you have hit the optimal load with N160. I think you should try a stating load of N140.
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donki1967
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Re: Vithavuori for the 30-40

Post by donki1967 »

When I have developed my normal 30-40 reloading, I will be interested in planing a reduced load.

Has a shooter ever used Vhitavuori N120 to make reduced loads?

(N120 should have nearly the same burning rate as IMR 4198.)

Regards

FredC
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Re: Vithavuori for the 30-40

Post by FredC »

I have no experience what so ever with this powder. Before I would try it, look at loading data for 303s and see if there are any loads in the range you want to try. Some powders do well with reduced loads and some can cause detonation. Other ills could be misfire with a bullet lodged in the barrel. That could cause a catastrophic accident if it is not caught and another round is fired. There is one high performance pistol powder that I know of that the minimum safe loads and the max loads are very close together. Perhaps on other published loading data for N120 you could look for the range of minimum and maximum loads and get a clue if it is a tolerant powder. Parashooter may be able to help with this.

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Parashooter
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Re: Vithavuori for the 30-40

Post by Parashooter »

QuickLOAD estimates - NOT LOAD DATA!

Cartridge : .30-40 Krag
Bullet : .308, 150, Sierra SPFN 30-30 2000
Cartridge O.A.L. L6: 2.714 inch or 68.94 mm
Barrel Length : 30.0 inch or 762.0 mm
Powder : Vihtavuori N120

Predicted data by increasing and decreasing the given charge,
incremented in steps of 3.333% of nominal charge.
CAUTION: Figures exceed maximum and minimum recommended loads !

Code: Select all

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

-33.3   49    20.00   1800    1079   15043   2764     97.3    2.238
-30.0   51    21.00   1869    1163   16435   2898     98.3    2.158
-26.7   53    22.00   1936    1249   17944   3022     99.0    2.083
-23.3   56    23.00   2002    1335   19554   3136     99.6    2.013
-20.0   58    24.00   2067    1423   21254   3238     99.9    1.947
-16.7   61    25.00   2130    1511   23053   3328    100.0    1.884
-13.3   63    26.00   2191    1599   24980   3412    100.0    1.825
-10.0   66    27.00   2251    1687   27042   3495    100.0    1.770
-06.7   68    28.00   2309    1775   29247   3577    100.0    1.717
-03.3   70    29.00   2366    1864   31600   3657    100.0    1.667
+00.0   73    30.00   2421    1952   34109   3736    100.0    1.620
+03.3   75    31.00   2476    2041   36782   3814    100.0    1.575
+06.7   78    32.00   2529    2131   39628   3891    100.0    1.527

donki1967
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Re: Vithavuori for the 30-40

Post by donki1967 »

@Parashooter,
Can You explain this data to me?

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Parashooter
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Re: Vithavuori for the 30-40

Post by Parashooter »

donki1967 wrote: Fri Jun 11, 2021 3:44 amCan You explain this data to me?
"QuickLOAD estimates - NOT LOAD DATA!"

Consisting of computer estimates for various parameters such as pressure and velocity generated by different charge weights of a given powder with a specified combination of cartridge, barrel, and bullet, it can help experienced handloaders develop effective loads for combinations not covered by reliable, pressure-tested load data. It's not appropriate for novices with limited load-development experience.

For more info on the software, see https://www.neconos.com/quickload-balli ... -software/

Note also -
"If you live in Europe, please order QuickLOAD/QuickTARGET from the following source: Ing. Hartmut Broemel, Neubrecker Weg 15, D-64832 Babenhausen, Germany, fax/phone (+49) 0 6073 688481 Reimer Johannsen GmbH, Haart 49, D-24535 Neumuenster Phone +49 4321 2758, Fax +49 4321 29325, Quickload Order Nr. LEW 999, or Frankonia Jagd, 97064 Wurzburg, TEl. 0180 5372699, www.frankonia.de, . . . "

donki1967
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Re: Vithavuori for the 30-40

Post by donki1967 »

OK,

I can also use GRT, moreover this software is free.
I admit that I never used a reloading software.
Thank you

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butlersrangers
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Re: Vithavuori for the 30-40

Post by butlersrangers »

'Donki' - You are not alone. Most of us use published reloading data.

I have a poor understanding of QuickLoad Estimates and of reloading software.

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