N330 in .357 Magnum

[iagbarrb]

Hy folks
where I live we do not have so many powder options.
Ive found Vihta N330 that should have a faster burn rate than N340 and a slower than N320.
Vihtavouri tells nothing about .357 reliads for N330 and only shows 357 cowboy action.
Problem is I do need over 1200 fps for competition.
Any comments or experiences?

 

[Mad Chemist]

What bullet weight are you using that requires over 1200fps?

 

[joneb]

What gun and barrel length?
VV N-330 maybe a poor choice for your application, I would hold out in hopes of finding a more appropriate powder.

 

[Walkalong]

7.0 Grs of N330 and an X-Treme 158 Gr SWC loaded at 1.488 OAL gave just under 1100 FPS from a 4 5/8" Blackhawk. It was fairly position sensitive and wasn't anything spectacular, so I quit there. It can work though. It gave similar velocity with a 110 Gr JHP with the same charge.

This load appeared safe in my gun with my load technique. Use at your own risk.

 

[iagbarrb]

The bullet will be round nose 158 lead.
8 inch barrel Dan Wesson.
But it is good to know you were at 7 gn N330. I am at 5.7 gn 1066 fps

 

[Walkalong]

I went from 6.7 Grs to 7.0 Grs N330, and the velocity didn't really change at all, which told me I needed to stop. Any time you stop gaining reasonable velocity with a good increase in powder you are at the top, maybe over.

 

[iagbarrb]

Tanks for the replies. Comments were really usefull. With 7 gn N330 with an 8 inch DW barrel 1240 fps. 6.7gn 1200fps. There are no overpreassure signs on primers or brass.

THIS ARE NOT OFFICIAL OR RECOMENDED LOADS. USE AT YOUR OWN RISK.