10mmShooter
08-08-2010, 04:57 PM
Hi Guys,
Just need to see if anyone is using a load close to this.
weapon is a SW686 8-3/8 barrel(.357)
powder charge is 4.8g WW231 (max .38 +P loading per Winchester manual)
OAL is 1.40 in with bullet seated to top of the crimp grove(.38 brass)
bullet is a 150 SWC RCBS, avg weight 153g
Federal small mag primer #200
minimal crimp just enough to knock the bell off the case.
Winchester manual says 860 fps...assuming more normal OAL of 1.455
My goal is to deep seat to gain better inigition and consistency in fps.
Currently my chrono is showing my load at average 975fps over thirty rounds. Obiviously I'm running higher pressure given the deeper seating of the swc(about 40 thousandths). I seem to have picked up 110 fps. Which is good and what I desired, extreme spread is small now. Also no hard extrations, no smushed primers...everything looks good.
Just want to confir to see if anyone has a similiar loading and what velocities are you seeing?? :coffeecom
http://www.keithrussell.net/seatingdepth.jpg
Just need to see if anyone is using a load close to this.
weapon is a SW686 8-3/8 barrel(.357)
powder charge is 4.8g WW231 (max .38 +P loading per Winchester manual)
OAL is 1.40 in with bullet seated to top of the crimp grove(.38 brass)
bullet is a 150 SWC RCBS, avg weight 153g
Federal small mag primer #200
minimal crimp just enough to knock the bell off the case.
Winchester manual says 860 fps...assuming more normal OAL of 1.455
My goal is to deep seat to gain better inigition and consistency in fps.
Currently my chrono is showing my load at average 975fps over thirty rounds. Obiviously I'm running higher pressure given the deeper seating of the swc(about 40 thousandths). I seem to have picked up 110 fps. Which is good and what I desired, extreme spread is small now. Also no hard extrations, no smushed primers...everything looks good.
Just want to confir to see if anyone has a similiar loading and what velocities are you seeing?? :coffeecom
http://www.keithrussell.net/seatingdepth.jpg