Reloading 350 Legend for subsonic?

[Timmis2]

Hodgdon has published load data for 350 Legend loaded for subsonic using the same projectile and 6 different powders. The projectile they use is a Hornady 250 grain subsonic. Shooters World has data for lighter projectiles (125 to 158 grain) but with powder that is no longer in production (Buffalo Rifle).

I would like to reload 350 Legend with light grain projectiles for subsonic speeds. How can I safely go about that with the limited data available? If I substituted the Hornady 250 grain projectile for a much lighter grain projectile, how would one adjust the powder charge to compensate for the difference?

 

[Horsemen61]

Why? Seems like a 9mm would be a better option

 

[Timmis2]

Why? Seems like a 9mm would be a better option

I agree...I would be substituting the 350 Legend projectiles with 9mm projectiles loaded to 350 Legend cases. There are a few 350 Legend projectiles with similar grain weight to 9mm and 350L will accept bullet diameters from .355" to .357", and I wouldn't be sending them faster velocities than they are rated for.

 

[TravisC]

Trailboss works great and is very accurate in my bolt gun. Cfeblk is good too. Sending light 9mm HP bullets subsonic thru a bolt gun repeater is so much fun and works very good, better than the 300blk in my experience

 

[Timmis2]

Trailboss works great and is very accurate in my bolt gun. Cfeblk is good too. Sending light 9mm HP bullets subsonic thru a bolt gun repeater is so much fun and works very good, better than the 300blk in my experience

Trail Boss is gone. I've heard that Titegroup is a good substitute for subsonic reloads though.

 

[SeabeeKen]

SW still lists buffalo rifle on their site. I've heard nothing about it being discontinued

 

[450BM]

I shoot a lot of 127gr TC (9mm bullets) out of my bolt 350 legend. I bought it for all the 357 pistol bullets I have but quickly found that semi wadcutters don’t chamber well in a bolt gun. The TC nose works great! Just about any fast to medium pistol powder works well. I’ve used Bullseye, AutoComp and Unique but use BE-86 the most because I have an 8lb jug of it. Same burn rate as Unique but meters much better. (And I have more of it). Small pistol primers work very well.

I’ve safely used 38 special to 357 Maximum load data.

 

[TravisC]

Trail Boss is gone. I've heard that Titegroup is a good substitute for subsonic reloads though.

I have a decent supply..wish it was more tho.

 

[TravisC]

I shoot a lot of 127gr TC (9mm bullets) out of my bolt 350 legend. I bought it for all the 357 pistol bullets I have but quickly found that semi wadcutters don’t chamber well in a bolt gun. The TC nose works great! Just about any fast to medium pistol powder works well. I’ve used Bullseye, AutoComp and Unique but use BE-86 the most because I have an 8lb jug of it. Same burn rate as Unique but meters much better. (And I have more of it). Small pistol primers work very well.

I’ve safely used 38 special to 357 Maximum load data.

Try resizing it with .355 bullet die. Works like a charm

 

[450BM]

Try resizing it with .355 bullet die. Works like a charm

Not a semi wadcutters or wadcutter…. The only way to chamber them was hold the barrel straight down and shake them in.