I am trying to come up with a good load for my son's .300 wsm using 165gr nosler accubonds.

I am shooting for a load over 3000 fps.

I have tried h4350, R22, Hodgdon super,

I am getting anywhere from 1.5"-2.5" with a Savage bolt action.

I used H4831 SC in my 300 WSM for 165s and 180s.

You would be hard pressed to find a powder better than than Winchester 860 Supreme hybrid powder.
you will be able to push the bullet to 3,100-3,200 fps with no problem with pressure.
I use the powder in my 8mm Rem.Mag with a 200 grain bullet and 3,200 fps is easy to do and very accurate at long range.
The powder is very clean burning,little to no flash,and has low chamber pressures and the highest velocities you will ever see.

The best load I have found for the 300WSM with 165 grain bullets is Win case filled with 66 grains of IMR4350. This load is very accurate (sub .5 MOA) and runs 3000 ft/sec. I would consider this a Max load in both rifles I have shot it in.

I just loaded up some 165 gr.ballistic tips with Superperformance.I have not chronod them yet but at 200 yds it was shootin 1 1/4 inch groups.

I was getting the same with 3 gr. less than max than with max at 3120 with the Superperformance . My gun did not burn the powder well with max loads, and the groups where 2" to 2-1/2.

Loads that have worked well for me with 165gr bullets:
65.0grs Win. 760 3150fps
65.0grs IMR-4350 3015fps
67.0grs Ramshot Hunter 3070fps
69.0grs Reloader-22 3030fps

Baldhunter, are you using the standard OAL, or are you loading with the bullet touching the lands.

quote:

Originally posted by Rapidrob:
You would be hard pressed to find a powder better than than Winchester 860 Supreme hybrid powder.
.

Never heard of it.

I have three powders that perform very well in my CZ 300WSM with 165gr bullets. In order of accuracy, Norma MRP, Rmashot Hunter, R-17.

It is listed as WC860 Look it up in Google , Not very popular ! My choice IMR 4350

quote:

Originally posted by Concho42:
It is listed as WC860 Look it up in Google , Not very popular ! My choice IMR 4350

Doubt it. WC 860 is for the 50 BMG and has a burn rate similar H870, way to slow for the 300WSM. You will need over 125% fill to get even close to max velocity and pressure in the 300WSM.

http://www.gibrass.com/gunpowder.html



.

 Cartridge          : .300 WSM (CIP)
Bullet             : .308, 165, Nosler PART SP 16330
Cartridge O.A.L. L6: 2.860 inch or 72.64 mm
Barrel Length      : 24.0 inch or 609.6 mm
Powder             : Hodgdon H870

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   91    64.00   2118    1644   21006   7806     67.7    1.762
-18.0   94    65.60   2182    1745   22481   8218     69.8    1.715
-16.0   96    67.20   2248    1852   24080   8636     72.0    1.697
-14.0   98    68.80   2316    1965   25815   9056     74.1    1.646
-12.0  100    70.40   2386    2086   27700   9476     76.3    1.596
-10.0  103    72.00   2458    2213   29750   9895     78.4    1.546
-08.0  105    73.60   2531    2347   31986  10309     80.5    1.498
-06.0  107    75.20   2606    2488   34425  10715     82.5    1.449
-04.0  110    76.80   2683    2637   37098  11112     84.4    1.401
-02.0  112    78.40   2761    2793   40029  11496     86.3    1.349
+00.0  114    80.00   2841    2956   43249  11864     88.1    1.300
+02.0  116    81.60   2922    3127   46800  12213     89.9    1.251
+04.0  119    83.20   3004    3306   50722  12539     91.5    1.204
+06.0  121    84.80   3088    3493   55074  12840     93.0    1.159  ! Near Maximum !
+08.0  123    86.40   3172    3687   59916  13112     94.4    1.114  ! Near Maximum !
+10.0  126    88.00   3258    3890   65327  13351     95.6    1.071  !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    114    80.00   3090    3499   53994  12592     96.6    1.173
Data for burning rate decreased by 10% relative to nominal value:
-Ba    114    80.00   2543    2370   34463  10270     74.7    1.451
 

Surely he meant Winchester 780 Supreme.

Chris

quote:

Originally posted by CISCO:
Surely he meant Winchester 780 Supreme.

Chris

I duno, I thought that as well. I did the Google on 860 Supreme hybrid powder. It pops up on several forums and each one is a post from Rapidrop. If it was a typo, then he has posted the same typo all over the net for more than a few years. I think he hasn't a clue what he has or how to use it.

Maybe he took some 780 Supreme, mixed it with a little Hybrid 100V and a little WC 860 and can up with his 860 Supreme hybrid powder!

Ah yes, the duplex load any hand loader can duplicate.

Seriously folks don't try that at home or anywhere else.

Chris