6.5x55 Swede

[Aussie Wanderer]

Just wondering if anyone is using H4350 with 129sst bullets or the like? Any thoughts on what QL would look like running modern pressures in a modern rifle would look like. 22 inch barrel.

 

[DrMike]

Cartridge          : 6.5 x 55 Swedish
Bullet             : .264, 129, Hornady SST InterLock 26202
Useable Case Capaci: 52.904 grain H2O = 3.435 cm³
Cartridge O.A.L. L6: 3.150 inch = 80.01 mm
Barrel Length      : 22.0 inch = 558.8 mm
Powder             : Hodgdon H4350 *T

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   91    43.29   2626    1975   46487  10857     96.2    1.246
-09.0   92    43.77   2654    2017   47939  10977     96.6    1.228
-08.0   93    44.25   2681    2059   49435  11094     96.9    1.210
-07.0   94    44.73   2709    2102   50976  11208     97.3    1.193
-06.0   95    45.21   2737    2145   52565  11318     97.6    1.176
-05.0   96    45.70   2764    2189   54202  11425     97.9    1.160
-04.0   97    46.18   2792    2233   55890  11527     98.2    1.143  ! Near Maximum !
-03.0   98    46.66   2819    2277   57630  11627     98.4    1.127  ! Near Maximum !
-02.0   99    47.14   2847    2321   59424  11722     98.7    1.111  ! Near Maximum !
-01.0  100    47.62   2874    2366   61274  11813     98.9    1.096  ! Near Maximum !
+00.0  101    48.10   2902    2411   63182  11900     99.1    1.081  ! Near Maximum !
+01.0  102    48.58   2929    2457   65151  11983     99.3    1.066  !DANGEROUS LOAD-DO NOT USE!
+02.0  103    49.06   2956    2503   67183  12062     99.5    1.051  !DANGEROUS LOAD-DO NOT USE!
+03.0  104    49.54   2983    2549   69279  12136     99.6    1.036  !DANGEROUS LOAD-DO NOT USE!
+04.0  105    50.02   3010    2595   71443  12206     99.7    1.022  !DANGEROUS LOAD-DO NOT USE!
+05.0  106    50.51   3037    2642   73678  12270     99.8    1.009  !DANGEROUS LOAD-DO NOT USE!

Results caused by ± 5% powder lot-to-lot burning rate variation using nominal charge
Data for burning rate increased by 5% relative to nominal value:
+Ba    101    48.10   2964    2516   68556  11791     99.9    1.043  !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 5% relative to nominal value:
-Ba    101    48.10   2829    2292   57846  11869     97.3    1.124  ! Near Maximum !

 

[ElmerThud]

Due to EU 'REACH' regs in Europe many of the old IMR/Hodgdon/Alliant etc propellants are no longer available in UK.
These manufacturers now have in place other REACH compliant propellants... though mostly I use Vihtavouri N550 or N550 depending on bullet/cartridge.
For what I'm shooting here, better MV & range with 6.5x55SE seems to work with the Hornady123gn SST

 

[Aussie Wanderer]

Gee Mike that is a lot quicker than the 4831 (2213) my son is running now. Might have to have a look at that and see how it shoots. The 2213 has him just over 2,700fps and it feels like it should be doing more. It has however very accurate with that powder. Thanks for the QL

 

[Blkram]

You'll want to keep in mind that most SAAMI loads for the 6.5x55 are kept to the lower pressures for the older Scandinavian military rifles (e.g. normal velocities for a 140 gr bullet kept to approx 2650 fps), whereas the pressures used for modern firearms are higher (e.g. velocities for a 140 gr bullet run up to approx 2780 fps).
QuickLoad allows you to adjust the pressure level for load data, so you'll want to verify which firearm you are using velocity, if that is your goal, to get maximum potential; older or modern?
Obviously, the 129 gr bullets will achieve higher velocities, if safe to use the higher pressure standard.

 

[wvbuckbuster]

I use 46.0grs H4350 with the Sierra 120gr Pro Hunter Win LR primer in Lapua case gave 0.3615 in 3 shot group. Forgot to record the velocity. 22in barrel. Dan.

 

[Aussie Wanderer]

I load 45 in my 260 with that bullet. My son’s rifle for the Swede is a tikka so should handle the pressures just fine. Thanks for the reminder though.

 

[ElmerThud]

I use 46.0grs H4350 with the Sierra 120gr Pro Hunter Win LR primer in Lapua case gave 0.3615 in 3 shot group. Forgot to record the velocity. 22in barrel. Dan.

I also use 46gns H4350 with my Mannlicher Classic Stutzen & a 123gn SST - gives me around 2800fps with a 22" barrel - very accurate too - Rem. 9 1/2 primer. I'm using Norma brass. Not quite at 0.36's but definitely not more than 0.5" (Mostly)
It's definitely the indian that's the variable not the bow & arrow!

 

[wvbuckbuster]

Forgot to mention the load was shot in my Win Mod 70 Fwt. Dan.