New .260 Load.....

[Powerstroke]

I couldn't find any 130gr A-bonds like I've been shooting out of the .260 of late. I ran across a box of 130 Bergers ( I know, I know ) and decided to give them a try.... even switched powder and tried some Viht N-560 for the first time.
This was on a clean barrel... sure wish I'd have loaded more than 5. The first shot is the top hole....followed by three more cutting the same hole... and what do you know.....I'm all excited and pull the last one..... :evil:

 

[FOTIS]

One fouler and then 3 shots from a hunting gun. That is what I shoot at the range.

 

[Powerstroke]

Like you say POP, Three shots test the gun, 5 shots test the shooter... :x There is always next time.. I know that laod will shoot though....

 

[remingtonman_25_06]

Nice...

With a little tweaking you could probly tighten the 5 shot group. However like POP stated, for sporter weight hunting rifles, 3 is all that is practical IMO.

What was the velocity??

 

[JD338]

Powerstroke,

Looks like a great load. Like Remmy, what is your velocity?
Too bad you missed the quarter.:lol:

JD338

 

[FOTIS]

Cartridge : .260 Rem
Bullet : .264, 130, Berger VLD
Cartridge O.A.L. L6: 2.800 inch or 71.12 mm
Barrel Length : 22.0 inch or 558.8 mm
Powder : Vihtavuori N560

Predicted data by increasing and decreasing the given charge,
incremented in steps of 1.0% 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

-10.0 99 43.20 2575 1914 41450 10754 88.7 1.297
-09.0 100 43.68 2608 1963 42936 10915 89.4 1.276
-08.0 102 44.16 2641 2013 44490 11073 90.1 1.255
-07.0 103 44.64 2674 2064 46102 11228 90.8 1.233
-06.0 104 45.12 2708 2116 47780 11379 91.5 1.213
-05.0 105 45.60 2741 2169 49527 11527 92.1 1.193
-04.0 106 46.08 2775 2222 51349 11670 92.7 1.173 ! Near Maximum !
-03.0 107 46.56 2808 2277 53248 11810 93.3 1.153 ! Near Maximum !
-02.0 108 47.04 2842 2332 55225 11945 93.9 1.134 ! Near Maximum !
-01.0 109 47.52 2876 2388 57289 12075 94.4 1.115 ! Near Maximum !
+00.0 110 48.00 2910 2445 59442 12201 94.9 1.096 ! Near Maximum !
+01.0 111 48.48 2944 2503 61692 12322 95.4 1.078 !DANGEROUS LOAD-DO NOT USE!
+02.0 113 48.96 2979 2561 64041 12437 95.9 1.060 !DANGEROUS LOAD-DO NOT USE!
+03.0 114 49.44 3013 2620 66497 12547 96.4 1.042 !DANGEROUS LOAD-DO NOT USE!
+04.0 115 49.92 3047 2681 69064 12651 96.8 1.025 !DANGEROUS LOAD-DO NOT USE!
+05.0 116 50.40 3082 2742 71752 12750 97.2 1.008 !DANGEROUS LOAD-DO NOT USE!

Results caused by ± 10% powder lot-to-lot burning rate variation using nominal charge
Data for burning rate increased by 10% relative to nominal value:
+Ba 110 48.00 3086 2749 73001 12303 99.4 1.006 !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 10% relative to nominal value:
-Ba 110 48.00 2685 2082 47877 11393 86.1 1.211

 

[Powerstroke]

POP,

She has a 25in tube on her.....47.7 grains

#1-2958, #2 - 2972, #3 - 2980, #4 - 2985, #5 - 2983, Avg = 2975fps

 

[FOTIS]

Makes sense.

 

[Antelope_Sniper]

That gives you an:
average velocity of 2975.5
2556 foot pounds
Standard deviation of 5.4 :grin: :grin:

 

[Powerstroke]

Don't forget the "advertised" B.C. of .595 :shock:

 

[JD338]

Powerstroke

You definitely need to retest this load.
I think its a keeper.

JD338

 

[old #7]

Getting excited about the five shot group you are about to shoot can be worse that a bad case of buck fever.
I have been there many times.