Straight 284 Win Sierra 183 gr H4350 / RL-16 loads

[jawjaboy]

I've search the forums and found some load info but wanted to ask anyway.

What loads are you running with the Sierra 7mm 183s in the straight 284 with H4350 and RL-16? I've asked both Sierra and Alliant and neither has load data or at least any they will share.

 

[kyreloader]

In my F-class rifle, both powder tuned out right around 51.2-51.4g of H4350 for velocities right around 2830-2850fps from my 30” barrel. I have freebore of .225”.

 

[KenOath]

In my F-class rifle, both powder tuned out right around 51.2-51.4g of H4350 for velocities right around 2830-2850fps from my 30” barrel. I have freebore of .225”.

Kyreloader
How is the accuracy compared to Berger 180s?

Cheers Rushty

 

[jawjaboy]

Thanks KL.

 

[kyreloader]

Berger 180g Hybrids seem to shoot in everything I have tried them in.
I had some luck with the 183s but had trouble with consistency. They seemed to shoot lights out one relay, then would have a couple unexplained shots the next.
To be honest, I had to abandon load development with the 183s because I needed to get squared away for Canada last year. I do plan to revisit them in the spring.

 

[Cowtownup]

I found the 183's to be about 40 fps slower than the 180 Hybrids with the same charge weight of H4350... I shot 300 of the 183's mostly with H4831sc but have pushed those to the side in favor of the Berger 180 Hybrids...

 

[Raptor]

What twist are you guys shooting the 180s in?? Will a 1-9 work??

 

[Willow]

What twist are you guys shooting the 180s in?? Will a 1-9 work??

I wouldn't count on it. I'd be erring on the side of caution and try them in a 1:8.5. My gunsmith reckons 1:8.25 is a safe bet.

 

[jawjaboy]

I'm running a 8.5 Tw.