180gr .357 Magnum data/doublecheck

[Quoheleth]

I ordered and received a box of the Missouri Bullet .357 180gr Striker bullet last week (ordered Sunday night; arrived Wednesday afternoon, FYI). My Lee manual gives data using AA#5 and #9 - both powders that I have.

I'm not opposed to either choice but before I run up a batch, I'm wondering if Unique or 2400 might also be acceptable. My Lyman pistol & revolver manual gives 9.7gr 2400 as start load with a 170gr bullet. Would that be an acceptable start load for the 180gr, too, or do I need to reduce further?

How about Unique? Any data with it?

Oh...last question...would magnum primers be better with this heavy of bullet or can I continue to use the SPP? I've been using standard primers with no problems.

Q

 

[Walkalong]

Unique and 240 are pefectly suitable. I got called in to work, but will be home soon and can check for data.

Primers are matched to the powder, not the bullet weight.

 

[rcmodel]

Alliant used to list a 200 grain lead bullet in .357 Mag.
Max charges:
Unique = 6.0
2400 = 10.0
Reduce 10% for a starting load.
Either should be perfectly safe with 180's.

A good rule of thumb is.
Standard primers with flake powder.
Mag primers with ball powder.

rc

 

[Walkalong]

Speer #13, in the Silhouette Load section, 13.5 Gr MAX of 2400 using a mag primer with a 180 Gr jacketed bullet @ 1.690 O.A.L. for 1416 FPS. (Silhouette loads loaded long, which needs a long cylinder)

RCBS Cast Bullet Manual #1 show 12.8 Grs of 2400 using a mag primer with their 175 Gr lead RN (38-175-RN) bullet for 1192 FPS from a 6" Security Six.

RCBS Cast Bullet Manual #1 show 12.0 Grs of 2400 using a standard primer with their 180 Gr lead Sil (357-180-SIL) bullet for 1192 FPS from a 6" Security Six.

Unique would be good for lower velocities, but would not get then to their full potential, same as AA #5 wouldn't, but I have no data.

 

[Landric]

In my experience with the 200 grain Lyman 358430, 10.0 grains of 2400 is a seriously light load. I was only getting about 900 fps out of my 4" 681. On the other hand, 13.0 grains of 2400 with the same bullet was getting 1155 fps out of the same gun with the same OAL.

I'm pretty much married to 2400 for my magnum loads, but I was not impressed with the 10 grain "max" load for the 200 grain bullet. I suspect that data was reduced significantly because it was a lead rather than jacketed bullet.

 

[joneb]

A good rule of thumb is.
Standard primers with flake powder.
Mag primers with ball powder.

 

[Steve C]

This bullet looks very close to the one sold by Missouri.

 

[DWFan]

This might help...