Stats Shooter
New member
The other day I started a thread asking about data for the .357 mag, and a 6" barrel. I did some testing yesterday and thought I would share
Gun: Dan Wesson (Monson Mass) w/6" barrel
CCI 550 Primers
Win Brass
H110 Powder
158 grain Hornady XTP
12 shots (2 cylinders full) per series
velocities taken with a Labradar
All loaded on a dillon 550C
OAL 1.581"
Heavy Crimp
CAUTION: The following post includes loading data beyond or not covered by currently published maximums for this cartridge. USE AT YOUR OWN RISK. Neither the writer, The Firing Line, nor the staff of TFL assumes any liability for any damage or injury resulting from the use of this information.
15.2 gr
avg 1089
es 31 fps
std 15.7 fps
15.6 gr
avg 1130 fps
es 61
std 21.4
15.8 gr
avg 1153 fps
es 70
std 25.8
16 gr
avg 1171 fps
es 44
std 25.1
16.2 gr
avg 1188
es 91
std 34.5
16.4 gr
avg 1198
es 84
std 29.8
16.6 gr
avg 1208
es 38
std 21.7
16.8 gr
avg 1232
es 35
std 16.1
17 gr
avg 1253
es 30
std 11.74
I stopped at 17 gr. There were no pressure signs, each case fell out of the cylinder after firing and the primer pockets were tight. I stopped at 17 gr just because its over published data for the combo I used and I believe 1,250 fps is fast enough for the cartridge/combo.
Also, the 17 grain load is very accurate out of my gun. 3" groups at 25 yards which is about as well as I can shoot free hand.
Gun: Dan Wesson (Monson Mass) w/6" barrel
CCI 550 Primers
Win Brass
H110 Powder
158 grain Hornady XTP
12 shots (2 cylinders full) per series
velocities taken with a Labradar
All loaded on a dillon 550C
OAL 1.581"
Heavy Crimp
CAUTION: The following post includes loading data beyond or not covered by currently published maximums for this cartridge. USE AT YOUR OWN RISK. Neither the writer, The Firing Line, nor the staff of TFL assumes any liability for any damage or injury resulting from the use of this information.
15.2 gr
avg 1089
es 31 fps
std 15.7 fps
15.6 gr
avg 1130 fps
es 61
std 21.4
15.8 gr
avg 1153 fps
es 70
std 25.8
16 gr
avg 1171 fps
es 44
std 25.1
16.2 gr
avg 1188
es 91
std 34.5
16.4 gr
avg 1198
es 84
std 29.8
16.6 gr
avg 1208
es 38
std 21.7
16.8 gr
avg 1232
es 35
std 16.1
17 gr
avg 1253
es 30
std 11.74
I stopped at 17 gr. There were no pressure signs, each case fell out of the cylinder after firing and the primer pockets were tight. I stopped at 17 gr just because its over published data for the combo I used and I believe 1,250 fps is fast enough for the cartridge/combo.
Also, the 17 grain load is very accurate out of my gun. 3" groups at 25 yards which is about as well as I can shoot free hand.