.357 SIG powder and bullets recommendations

[SouthernCoyote]

I'm almost through my first 1k, so I will know after shoot the rest and size them if they need to be trimmed again. These were all once fired from Sage, and after cleaning them and resizing them the first time, the only ones that needed trimming were the "R-P" head stamps. All the rest were from 0.860"-0.863". The "R-P" were over max length which is 0.865". The most uniform ones were the SIG head stamp, then the Speer. The "R-P" and Speer head stamp were all tiny flash hole like the Lapua rifle brass.

[Guns4545]

I'm almost through my first 1k, so I will know after shoot the rest and size them if they need to be trimmed again. These were all once fired from Sage, and after cleaning them and resizing them the first time, the only ones that needed trimming were the "R-P" head stamps. All the rest were from 0.860"-0.863". The "R-P" were over max length which is 0.865". The most uniform ones were the SIG head stamp, then the Speer. The "R-P" and Speer head stamp were all tiny flash hole like the Lapua rifle brass.

Good to know. I would have thought Speer had standard flash holes. Guess I'll need to wait until the mighty armory decapping die comes in. Should be end of the week. After cleaning and resizing I'll check them all to be sure they are within spec. If not I'll trim them.

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[Guns4545]

I'm almost through my first 1k, so I will know after shoot the rest and size them if they need to be trimmed again. These were all once fired from Sage, and after cleaning them and resizing them the first time, the only ones that needed trimming were the "R-P" head stamps. All the rest were from 0.860"-0.863". The "R-P" were over max length which is 0.865". The most uniform ones were the SIG head stamp, then the Speer. The "R-P" and Speer head stamp were all tiny flash hole like the Lapua rifle brass.

Do you think power pistol would be a good choice for xtreme 124gr fp? What coal are you running?

Also for 125gr Speer gold dots would Longshot be the best choice?

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[Guns4545]

Do you think power pistol would be a good choice for xtreme 124gr fp? What coal are you running?

Also for 125gr Speer gold dots would Longshot be the best choice?

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Just getting to load 357 Sig now lol. Where can I find find load data for AA #9 using 124gr xtreme flat point?

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[SouthernCoyote]

Just use Western Powders suggested charge for their 124/125 grain for AA#9 (11.7 - 13.0 grains and COL of 1.140"). The Xtremes can handle the velocity, I've run them at 1,450fps and they shoot fast, flat, and accurate. However for plinking I've backed off a tad to save on case life. I run em around 1,320fps now. Very accurate.

Edit: be careful on certain brand cases of running near max or max loads.. the AA#9 powder fills the case FULL and the compression from seating the bullets can bulge the shoulders and cause the rounds not to feed or chamber. Different cases have slightly different internal volumes. I've found this out using mixed headstamps.

[Guns4545]

Just use Western Powders suggested charge for their 124/125 grain for AA#9 (11.7 - 13.0 grains and COL of 1.140"). The Xtremes can handle the velocity, I've run them at 1,450fps and they shoot fast, flat, and accurate. However for plinking I've backed off a tad to save on case life. I run em around 1,320fps now. Very accurate.

Edit: be careful on certain brand cases of running near max or max loads.. the AA#9 powder fills the case FULL and the compression from seating the bullets can bulge the shoulders and cause the rounds not to feed or chamber. Different cases have slightly different internal volumes. I've found this out using mixed headstamps.

Thanks bud. Any cases that come to mind I should be aware of? I'll never go max anyways. These will be plinking rounds.

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[SouthernCoyote]

I can't remember which one's had less volume, but I run around 12.5 grains for plinking and it has kept shoulder bulge away.. All my hollow points.are loaded with same headstamp so I can run hotter.

[Guns4545]

I can't remember which one's had less volume, but I run around 12.5 grains for plinking and it has kept shoulder bulge away.. All my hollow points.are loaded with same headstamp so I can run hotter.

What headstamp do you use for hollow points?

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