270wsm what is a great bullet powder combo

[Simon B]

I would like to put together a great all around 270wsm load for my nephew. He will be hunting deer and black bear. I have heard good things about the 140 grain Nosler accubond and also good things about IMR4350 and RL19, both of which i have on hand. Unfortunately i do not have access to the rifle because my nephew lives a few hours away (so i have to try and get the combo right the first time) but i do know that it is a Tikka T3.

so what are the experiences of THR what works well, what would be a good bullet powder combo, and what COL has worked for you?

Hunting season is fast approaching and i would like to get this done soon. I look forward to your responses.
Thank you.

 

[hoghunting]

I have great luck with RL-19, but I worked up my loads before RL-17 was available. I haven't tried the 17 yet, so I don't know how well it works.

Loading for the T3, your OAL will be the length that fits in the magazine.

 

[Horsemany]

IMR 4350 gave me better results than RL19 in my Sako. Accubonds would be fine. I had great luck with all Sierras tried in 130 to 150grain. I personally still like Partitions better than Accubonds. I feel like the Accubonds don't expand hardly at all compared to Partitions. They're both great bullets though.

 

[Kernel]

For the .270 WSM with 140 gr bullets, Powley's Computer likes powders in the speed range of 4831. RL19 & N560, being just a bit faster, would be right there in the ballpark.

 

[FredHunter]

I have a 300 wsm and realy like the RL-17. It was made with the wsm's in mind. It seems to have less kick than shelf ammo and is just has fast.
Fred

 

[Kernel]

RL17 is an ideal powder for the 300 WSM. But the .270 WSM is a different animal. It wants a slower powder, due to it's smaller expansion ratio.

 

[ForneyRider]

I tried R22, then IMR 4350 and R19. IMR 4350 was the best performer with 130gr Accubonds. R19 was peaky at max load, where IMR was very consistent 30fps with .5gr increments. R22 never got up to speed.

I used Norma brass, CCI magnum primers. Although, if I were starting over, I would use non-magnum. A magazine review of Winchester factory loads of WSM, reported that non-magnum primers are used.

 

[Simon B]

Thank you all for the great info. I will be loading up with IMR4350 and RL19.

 

[FredHunter]

Here is the data from Alliant on the .270 WSM for RL17.


Caliber Bullet Case Minimum OAL (inches) Bbl Length Primer Powder Charge Weight (grains) Velocity (fps) Notes
270 WSM Speer 100 gr HP Winchester 2.73 24 Fed 215 Reloder 17 67.5 3,668 -
270 WSM Speer 130 gt BTSP Federal 2.7 - Fed 215 Reloder 17 62 3,258 -
270 WSM Speer 150 gr BTSP Federal 2.7 24 Fed 215 Reloder 17 60 3,041 -