Quickload Request?

[ElmerThud]

Hi folks, if anyone is kind enough to help, I'd like QL details on the following please:
.25-06Rem.
Vihtavouri N560 & 110gn Nosler AccuBond bullet. 22" Barrel
Currently I load 51.2-52gns Viht N560 & MV a bit down on where I think it could be - it's accurate, but I think maybe a bit more MV is possible to maybe 3100
Cheers Guys

 

[jimbires]

58.7 grains looks to be max at 3242 FPS . it looks like you have room to go up in powder charge . proceed with caution

Cartridge : .25-06 Rem.
Bullet : .257, 110, Nosler AccuBond 53742
Useable Case Capaci: 60.236 grain H2O = 3.911 cm³
Cartridge O.A.L. L6: 3.250 inch = 82.55 mm
Barrel Length : 22.0 inch = 558.8 mm
Powder : Vihtavuori N560 *C

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 83 46.96 2537 1572 32234 11753 85.2 1.417
-18.0 85 48.13 2606 1658 34537 12191 86.8 1.379
-16.0 87 49.31 2675 1748 37008 12619 88.4 1.342
-14.0 89 50.48 2745 1841 39665 13034 89.9 1.299
-12.0 91 51.66 2815 1936 42521 13435 91.3 1.256
-10.0 93 52.83 2886 2034 45593 13820 92.6 1.215
-08.0 95 54.00 2957 2136 48906 14186 93.8 1.176
-06.0 97 55.18 3028 2239 52475 14532 95.0 1.138
-04.0 99 56.35 3099 2346 56325 14854 96.0 1.101 ! Near Maximum !
-02.0 101 57.53 3170 2455 60472 15152 96.9 1.065 ! Near Maximum !
+00.0 103 58.70 3242 2567 64909 15424 97.7 1.031 !DANGEROUS LOAD-DO NOT USE!
+02.0 106 59.87 3313 2680 69686 15666 98.4 0.999 !DANGEROUS LOAD-DO NOT USE!
+04.0 108 61.05 3384 2797 74836 15878 99.0 0.967 !DANGEROUS LOAD-DO NOT USE!
+06.0 110 62.22 3455 2915 80396 16057 99.4 0.936 !DANGEROUS LOAD-DO NOT USE!
+08.0 112 63.40 3525 3035 86407 16203 99.7 0.906 !DANGEROUS LOAD-DO NOT USE!
+10.0 114 64.57 3595 3157 92917 16312 99.9 0.878 !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 103 58.70 3413 2845 78790 15219 100.0 0.948 !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 10% relative to nominal value:
-Ba 103 58.70 3013 2217 51843 14729 90.6 1.139

 

[ElmerThud]

58.7 grains looks to be max at 3242 FPS . it looks like you have room to go up in powder charge . proceed with caution

Cartridge : .25-06 Rem.
Bullet : .257, 110, Nosler AccuBond 53742
Useable Case Capaci: 60.236 grain H2O = 3.911 cm³
Cartridge O.A.L. L6: 3.250 inch = 82.55 mm
Barrel Length : 22.0 inch = 558.8 mm
Powder : Vihtavuori N560 *C

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 83 46.96 2537 1572 32234 11753 85.2 1.417
-18.0 85 48.13 2606 1658 34537 12191 86.8 1.379
-16.0 87 49.31 2675 1748 37008 12619 88.4 1.342
-14.0 89 50.48 2745 1841 39665 13034 89.9 1.299
-12.0 91 51.66 2815 1936 42521 13435 91.3 1.256
-10.0 93 52.83 2886 2034 45593 13820 92.6 1.215
-08.0 95 54.00 2957 2136 48906 14186 93.8 1.176
-06.0 97 55.18 3028 2239 52475 14532 95.0 1.138
-04.0 99 56.35 3099 2346 56325 14854 96.0 1.101 ! Near Maximum !
-02.0 101 57.53 3170 2455 60472 15152 96.9 1.065 ! Near Maximum !
+00.0 103 58.70 3242 2567 64909 15424 97.7 1.031 !DANGEROUS LOAD-DO NOT USE!
+02.0 106 59.87 3313 2680 69686 15666 98.4 0.999 !DANGEROUS LOAD-DO NOT USE!
+04.0 108 61.05 3384 2797 74836 15878 99.0 0.967 !DANGEROUS LOAD-DO NOT USE!
+06.0 110 62.22 3455 2915 80396 16057 99.4 0.936 !DANGEROUS LOAD-DO NOT USE!
+08.0 112 63.40 3525 3035 86407 16203 99.7 0.906 !DANGEROUS LOAD-DO NOT USE!
+10.0 114 64.57 3595 3157 92917 16312 99.9 0.878 !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 103 58.70 3413 2845 78790 15219 100.0 0.948 !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 10% relative to nominal value:
-Ba 103 58.70 3013 2217 51843 14729 90.6 1.139

Many thanks Jim, this information is much appreciated. My Chrony was giving me fps readings around the 2850fps & I didn't trust the data, (My Chrony had been shot several times & repaired) but it seems it was fairly accurate. Anyway I junked the Chrony as it was 30yrs old. I'll be in Colorado in a couple of weeks so I bought a cheapie Caldwell & will bring it back from the states when I return. Cheers, George

 

[jimbires]

looks like your old chrony was in the ballpark .

 

[ElmerThud]

looks like your old chrony was in the ballpark .

It does look that way Jim, but it was a 30+yr old cheapie & had been shot a few times & repaired. Anyway, it's junked now & I'll pick up the new Caldwell when I'm in the USA next week. Your QL data tells me all I need to know... so the best I think I'm gonna get will be around 3000fps, more than enough for my purposes. Many thanks for the data, it is kind of you to share it with me. Cheers G