110 or 125 JHP bullets at 1450fps or faster will split a K frame forcing cone if enough are used.................
You can shoot 1250fps all day long and leave the slow burning magnum powders on the shelf...... and grab some medium rate powders to do your work for you......less flame and gases.
With most reloading data a 125gr in 38 brass in my 686 Magnum with a +P maximum load reaches 1205 fps and the standard 38 loads max out at 1021 to 950 fps.........but I usually keep all my 38 loads at below +P in case they find a way to my J frames.
Edit note:
when using 110 and 125gr Jhp bullets in a 357 magnum..........use full length 357 brass to keep the bullet jump to the forcing cone to a minimum.......... 38 brass with light bullets release the bullet a lot sooner and there is no bullet support,which can cause bullets to yaw off the center line when entering the barrel. 140gr bullets or heavier will come into contact with the barrel as it leaves the case which will help the forcing cone live a longer life. The Speer 158 LswcHP has TWO crimp rings
that can advance the bullet when in 38 cases to solve this problem.
Good loading.
You can shoot 1250fps all day long and leave the slow burning magnum powders on the shelf...... and grab some medium rate powders to do your work for you......less flame and gases.
With most reloading data a 125gr in 38 brass in my 686 Magnum with a +P maximum load reaches 1205 fps and the standard 38 loads max out at 1021 to 950 fps.........but I usually keep all my 38 loads at below +P in case they find a way to my J frames.
Edit note:
when using 110 and 125gr Jhp bullets in a 357 magnum..........use full length 357 brass to keep the bullet jump to the forcing cone to a minimum.......... 38 brass with light bullets release the bullet a lot sooner and there is no bullet support,which can cause bullets to yaw off the center line when entering the barrel. 140gr bullets or heavier will come into contact with the barrel as it leaves the case which will help the forcing cone live a longer life. The Speer 158 LswcHP has TWO crimp rings
that can advance the bullet when in 38 cases to solve this problem.
Good loading.
Last edited:
