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Questions about Speer .357 110g GDHP #15970895 04/04/21
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keith_dunlap Online Content OP
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Looking for a load for a
s&w 360
And/or
s&w m66 4”

I did not find a lot of information on the Internet. Seems like the 110 grain might be too light for the J frame.
I’m just looking to make a self-defense load for either of these revolvers

Should I be looking for a heavier bullet?


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Re: Questions about Speer .357 110g GDHP [Re: keith_dunlap] #15972689 04/07/21
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Re: Questions about Speer .357 110g GDHP [Re: keith_dunlap] #15977030 04/09/21
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Pappy348 Online Content
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I read decades ago that lightweight bullets at high velocities are hard on revolver forcing cones, especially thin ones like J-frames and even K-frames, which weren’t designed for continuous use with magnum loads. Eventually, heavier mid-sized guns like L-frames and the Rugers came out that could take the pounding, but forcing cones still will erode more quickly, even if they don’t crack like before.

If you’re stuck with those bullets because of the current crunch, I suggest you load them down a bit, maybe to where reliable expansion begins. Even at that, if that 360 is a fixed-sight gun, POI may be off somewhat.

Given a choice, I wouldn’t go below 125gr, and pretty much all I buy are 158s, jacketed or lead.

Years ago, my son used to go to industry seminars where those in attendance got to try out different products. The 360 was the gun that no one wanted to shoot twice.

Last edited by Pappy348; 04/09/21.

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Re: Questions about Speer .357 110g GDHP [Re: keith_dunlap] #15987812 04/12/21
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Re: Questions about Speer .357 110g GDHP [Re: keith_dunlap] #15988053 04/12/21
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Speer specifically state NOT to use the 110 Gold Dot SB HP in the .357 Magnum.




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Re: Questions about Speer .357 110g GDHP [Re: keith_dunlap] #15989329 04/13/21
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Son_of_the_Gael Offline
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Were they mine, I'd most likely use the .38+P data here:

https://reloadingdata.speer.com/downloads/speer/reloading-pdfs/handgun/38_Special_P_110_SB.pdf

Especially for the 360.

As always YMMV.


Last edited by Son_of_the_Gael; 04/13/21.

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