357 sig handloads

Reloading equipment, methods, load data, powder and projectile information.

357 sig handloads

Post by rastus » 25 Apr 2022, 8:31 am

Hello,

Would anyone have any handloads for 145-147 grain coated lead or plated / jacketed projectiles for the 357 Sig? I would like to use AP 100 if possible.

Thanks in advance for any advice.
rastus
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Re: 357 sig handloads

Post by rc42 » 25 Apr 2022, 7:40 pm

ADI have some load data for 357 Sig on their web site, you can also refer to load data for 38 Super Auto as a starting point and work your loads up..

However, if you don't already have the AP100 powder it's unlikely that you'll be able to find any.
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Re: 357 sig handloads

Post by rastus » 18 May 2022, 9:18 am

Thanks Rc42,

Apologies for the late reply. have not been near a computer.

Have also looked at the 180 grain plated HP 357 sig projectile made by Tigershark. Does anyone use these these projectiles in the 357 sig? if so what handload did they use?

Thanks again for any replies
rastus
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Re: 357 sig handloads

Post by Sarco » 20 May 2022, 10:34 pm

ADI only indicate the use of AP70 (rare as rocking horse poo at the moment) for 357Sig loads. That being said if you have AP100, it is a slower burning powder, but you could work up some loads with extreme care.
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Re: 357 sig handloads

Post by rastus » 31 May 2022, 9:36 am

Thank you. Has anyone handloaded 180 grain projectiles for the Sig?
rastus
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Re: 357 sig handloads

Post by rc42 » 01 Jun 2022, 9:47 pm

180gn would be a problem, for the rounds to fit in the magazine the projectile would have to be seated very deeply, leaving very little space for powder. Heavier projectiles are much better suited to slower powders but those powders are bulky need a lot of space in the case.
You'd only have space for some fast powder but the slow moving projectile could create dangerous chamber pressure peaks and you'd still only get a low muzzle velocity and a lot of drop with distance.

It might be possible to work up a usable load if you had a wide selection of powders but I have a feeling it won't be worth the effort.
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Re: 357 sig handloads

Post by rastus » 04 Jun 2022, 4:40 am

Thanks for the advice rc! much appreciated
rastus
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