Retumbo in a 270 weatherby mag

[Laker_Taker]

Anybody try this with a 150 grain bullet? Any info will help.

Thanks Aaron

 

[SJB358]

LT, I would check out the Hogdon site, it may have some decent info for you. I would think it would be a decent powder for the 270WBY. It is recommended for some heavier bullet loads in the 270WSM and the WBY is just more of a great thing. Scotty

 

[SJB358]

On edit, I just checked, Hogdon doesn't have anything for the 270WBY, Speer #14 lists 64.0gr's for starters and 68.0gr for a max load with their available 150's. If you ask Pop or Dr Mike, they may run a Quickload for you to get some data for Retumbo.

 

[Laker_Taker]

Thanks beretzs,
I have the latest Nosler book and speer and have looked at there starting loads. I was hoping to hear what other people experiences with this powder in the .270bee. My 30-378 loves it so I thought i would just try to play with it and see what happens.

 

[1Shot]

My 264 Win mag loves Retumbo. Your 270 Bee should also.

 

[FOTIS]

Anybody try this with a 150 grain bullet? Any info will help.

Thanks Aaron

Cartridge : .270 Weath. Mag.
Bullet : .277, 150, Nosler PART SP 16323
Cartridge O.A.L. L6: 3.295 inch or 83.69 mm
Barrel Length : 26.0 inch or 660.4 mm
Powder : Hodgdon Retumbo

Predicted data by increasing and decreasing the given charge,
incremented in steps of 1.754% 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

-17.5 87 60.19 2523 2121 29931 11066 94.7 1.686
-15.8 89 61.47 2583 2222 31763 11358 95.9 1.647
-14.0 91 62.75 2642 2325 33714 11628 96.9 1.610
-12.3 93 64.03 2702 2432 35795 11876 97.8 1.573
-10.5 95 65.31 2761 2540 38015 12099 98.5 1.532
-08.8 97 66.59 2821 2650 40382 12296 99.1 1.488
-07.0 99 67.87 2880 2763 42915 12466 99.6 1.446
-05.3 100 69.15 2939 2877 45623 12606 99.9 1.404
-03.5 102 70.43 2997 2992 48512 12716 100.0 1.364
-01.8 104 71.71 3055 3109 51623 12801 100.0 1.325
+00.0 106 73.00 3112 3227 54951 12880 100.0 1.288 ! Near Maximum !
+01.8 108 74.28 3169 3345 58521 12956 100.0 1.251 ! Near Maximum !
+03.5 110 75.56 3225 3465 62357 13028 100.0 1.216 ! Near Maximum !
+05.3 112 76.84 3281 3586 66486 13097 100.0 1.181 !DANGEROUS LOAD-DO NOT USE!
+07.0 113 78.12 3337 3709 70930 13161 100.0 1.148 !DANGEROUS LOAD-DO NOT USE!
+08.8 115 79.40 3392 3833 75727 13222 100.0 1.116 !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 106 73.00 3256 3532 68651 12333 100.0 1.178 !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 10% relative to nominal value:
-Ba 106 73.00 2891 2783 43666 13141 97.1 1.429

 

[Laker_Taker]

Thanks Pop, I going to load up a few round with 150 and 160 partitions and see what happens. should be fun.

Thanks Aaron

 

[SJB358]

Man, a 150gr Partition at 3200 would be some serious medicine for about anything. I can push a 150gr Partition into 3100FPS and think that is a decent load, so 3200+ is smoking. Plus, that load should shoot about like a laser. Looking forward to seeing how your loads turn out. Scotty