300 Win Mag With 190 CCs

[CMBTshooter]

I'm looking for a steel shooting load for my .300 Win Mag and I just picked up some 190 grain CCs from SPS. What's a good load for these and RL-22? I was thinking about just using the Nosler guide for the 200 grain bullets and working from the minimum until I got pressure signs then backing off.

 

[DrMike]

Cartridge : .300 Win. Mag.(W)
Bullet : .308, 190, Nosler CC HPBT 53412
Useable Case Capaci: 83.516 grain H2O = 5.423 cm³
Cartridge O.A.L. L6: 3.340 inch = 84.84 mm
Barrel Length : 26.0 inch = 660.4 mm
Powder : Alliant Reloder-22

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 79 61.60 2454 2541 31403 9828 93.1 1.679
-18.0 81 63.14 2515 2669 33559 10124 94.2 1.637
-16.0 83 64.68 2576 2800 35868 10406 95.3 1.596
-14.0 85 66.22 2637 2934 38337 10674 96.2 1.549
-12.0 87 67.76 2698 3072 40980 10927 97.1 1.501
-10.0 89 69.30 2759 3211 43782 11162 97.8 1.456
-08.0 91 70.84 2819 3354 46750 11380 98.5 1.412
-06.0 93 72.38 2880 3498 49914 11579 99.0 1.369
-04.0 95 73.92 2939 3645 53289 11757 99.4 1.329 ! Near Maximum !
-02.0 97 75.46 2999 3794 56890 11914 99.7 1.290 ! Near Maximum !
+00.0 99 77.00 3058 3945 60737 12049 99.9 1.252 ! Near Maximum !
+02.0 101 78.54 3116 4097 64847 12160 100.0 1.216 !DANGEROUS LOAD-DO NOT USE!
+04.0 103 80.08 3174 4251 69242 12254 100.0 1.180 !DANGEROUS LOAD-DO NOT USE!
+06.0 105 81.62 3232 4407 73947 12344 100.0 1.147 !DANGEROUS LOAD-DO NOT USE!
+08.0 107 83.16 3289 4564 78989 12429 100.0 1.114 !DANGEROUS LOAD-DO NOT USE!
+10.0 109 84.70 3346 4722 84398 12511 100.0 1.083 !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 99 77.00 3182 4272 73141 11587 100.0 1.159 !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 10% relative to nominal value:
-Ba 99 77.00 2876 3489 48609 12059 96.2 1.376

 

[CMBTshooter]

Thanks Mike!

 

[.300winmag]

70.4 grains of RL-22 with 0.010 jump on 190 SMK's has given me several three shot groups at 100 yards under 1/4 MOA and I have shot a 4.XYZ" five shot group at 800 yards as well as consistent sub-MOA five shot groups at 1,000 yards. This is what I have found to work well, although, it shot so well the first time I loaded it, I haven't toyed with the load at all. That would be my starting point though. I use Fed 215M primers and Rem. Cases.

Although, I would look at the 210 Berger VLD, I shoot it in my .300 Win. Mag and know several other shooters/hunters using it that have been as happy as I have. It will be a little more expensive to shoot, but a few cents on a bullet is well worth a smile on my face!

Good shooting!

 

[SJB358]

I was thinking somewhere around 76 grains of RL22 is usually pretty awesome in a 300 Win Mag with about any 180 grain bullet..

Show us some groups when you can.

 

[.300winmag]

Velocity with my load out of a 28" Hart at 5450' elevation is 2977 fps. With SJB358's load I'd expect much more! I am going to start at 74.0 grs and work up to see if I can match the accuracy and precision on my current load. If I can't no worries, the accuracy is great for just ringing steel and punching paper, Have shot my current load to 1,220 yards and been satisfied. But SJB's load is nagging at me so I have to try it!!

Thank's for the great info SJB!! I'll let you know how the results turn out in my rifle!!

 

[CMBTshooter]

I will definitely post pictures once the new Vortex 6.5-20x44 Mil Dot comes in!

 

[CMBTshooter]

I got another question for y'all and I figure I'll ask it here instead of starting a new topic. How much lubrication is required for neck sizing?

 

[SJB358]

I got another question for y'all and I figure I'll ask it here instead of starting a new topic. How much lubrication is required for neck sizing?

None. Maybe a little mica in the neck to let it slide through, but even then, I don't think it is required.

 

[Elkman]

I use just a touch of lube as needed, usually when they start to squeak. I use Imperial, neck sizing is really easy on cases.

 

[FOTIS]

I was thinking somewhere around 76 grains of RL22 is usually pretty awesome in a 300 Win Mag with about any 180 grain bullet..

Show us some groups when you can.

Pretty much yes.

Do not discount H1000. It made the 300 Winnie what it is today at 1000 yards. Hence the name H1000.