300 WSM with IM-7828SSC

[filmjunkie4ever]

Anyone given this a whirl with 180 grain Nosler bullets of any kind?

Been unable to get any kind of 4350 (my go-to in the WSM and my 30-06) and picked up some 7828SSC the other day at Sportsmans Warehouse here in Ammon. Any recipes?

Looking to launch 180 gr ABs and BTs at 2950-3000 fps. Just like my old 4350 loads do.

 

[FOTIS]

A little slow! However a compressed load

69.5C*grains 2943 62,600 PSI

Did you try RL 17?

 

[SJB358]

A little slow! However a compressed load

69.5C*grains 2943 62,600 PSI

Did you try RL 17?

I agree with Fotis, it is a touch slow for the 180's, but probably still usable, you will have some powder compression in order to get full speeds, but I didn't have much luck with RL22, which is about the same burn rate.

Cartridge : .300 WSM (CIP)
Bullet : .308, 180, Nosler PART SP 16331
Useable Case Capaci: 72.076 grain H2O = 4.680 cm³
Cartridge O.A.L. L6: 2.860 inch = 72.64 mm
Barrel Length : 24.0 inch = 609.6 mm
Powder : IMR 7828 SSC

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 94 64.49 2715 2945 43527 10799 93.2 1.338
-09.0 96 65.21 2748 3018 45084 10938 93.8 1.316
-08.0 97 65.93 2782 3093 46702 11072 94.4 1.294
-07.0 98 66.64 2815 3168 48386 11202 94.9 1.273
-06.0 99 67.36 2849 3244 50136 11327 95.4 1.252
-05.0 100 68.08 2883 3321 51957 11447 95.9 1.232
-04.0 101 68.79 2916 3399 53853 11562 96.4 1.211
-03.0 102 69.51 2950 3479 55829 11671 96.8 1.191 ! Near Maximum !
-02.0 103 70.23 2984 3559 57886 11775 97.3 1.172 ! Near Maximum !
-01.0 104 70.94 3018 3640 60029 11873 97.6 1.153 ! Near Maximum !
+00.0 105 71.66 3052 3722 62264 11966 98.0 1.134 ! Near Maximum !
+01.0 106 72.38 3086 3805 64599 12052 98.3 1.115 !DANGEROUS LOAD-DO NOT USE!
+02.0 107 73.09 3119 3889 67032 12131 98.6 1.097 !DANGEROUS LOAD-DO NOT USE!
+03.0 108 73.81 3153 3974 69575 12204 98.9 1.079 !DANGEROUS LOAD-DO NOT USE!
+04.0 109 74.53 3187 4060 72231 12270 99.2 1.061 !DANGEROUS LOAD-DO NOT USE!
+05.0 110 75.24 3221 4147 74988 12330 99.4 1.044 !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 105 71.66 3210 4119 75917 11664 100.0 1.045 !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 10% relative to nominal value:
-Ba 105 71.66 2836 3214 50437 11507 90.9 1.248

 

[russ808]

Maybe the 4831's
Russ

 

[filmjunkie4ever]

The 4350's have been a very accurate powder I just cant find any right now with things being the way they are. Dad shoots RL-22 in his 300 WSM but recently he found out that my 4350 loads were more accurate even in his rifle. Even then, RL-17, 19, and 22 are unavailable on any shleves in this area, jsut like the 4350. IMR-7828SSC is what I can find right now...guess I will just guinea pig it myself. Will post if it shoots worth posting. Thanks for the advice.

On a secular note, do you guys burn with Standard Rifle Priemrs in this cartridge or Margnum? I have never used the 215s as they seem excessive for this cartridge. Though I have had great luck with the Standard primers I am curious if anyone uses the magnum primers. Also I have considered the Fed 210 Match Primers.

 

[DrMike]

On a secular note, do you guys burn with Standard Rifle Priemrs in this cartridge or Margnum? I have never used the 215s as they seem excessive for this cartridge. Though I have had great luck with the Standard primers I am curious if anyone uses the magnum primers. Also I have considered the Fed 210 Match Primers.

I've used both LR and LRM primersd in the 300WSM. Somewhat more pressure generated with LRM primers, but no significant difference in accuracy when everything is considered. Because it is a shorter powder column, the large rifle primers will ignite quite well. Velocities work up to be identical, so there is no difference in using LR or LRM primers.

 

[filmjunkie4ever]

Thanks Doc. I see no reason to change was only considering an experiment thinking especially with a slow burner like 7828 that a magnum cap may be a better way to go. I have seen even short action cases benefit from a magnum cap when Spherical powders were used at times.

Thanks for the advice friend. Its always sound.

Cant wait to get some 180 BTs and load up a few for the range with the 7828.

Hope it turns out.