S&W 340 M&P .357 Magnum

Jim Taylor
[subject]
Tuesday, July 14, 2026, 11:12 (8 days ago)

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Been carrying this gun for quite a long time. My heavy load is the 125 gr. Speer over 20 gr. WC820. Out of the 1.75" barrel it will do a little over 1340 fps. Recoil is fierce.

I practice with a 160 gr. cast bullet and 3.0 gr. Bullseye in .38 Special cases. These do about 600 fps and are quite comfortable.

My right hand got boogered up in the crash and my thumb and first finger were completely numb. Feeling is slowly returning but movement is stiff. I most likely will carry .38 Special loads in the 340 as I don't think I could hold onto it very well with the heavy loads. Gonna do more left-handed work.

That's blistering performance for a snubby

WB
[subject]
Tuesday, July 14, 2026, 14:42 (8 days ago) @ Jim Taylor

I shot some 180 gr. FNGC with hot Longshot loads out of the hefty SP101. It was very salty and that weighs as much as a Glock 21!

Last time I had a 360J I even loaded some powder coated soft lead 200 gr. at 650 fps. THAT was salty too! Goofy idea anyway. I thought of the old backward HBWC filled with hot glue for fun. That might be interesting.

I've always admired your devotion to the mean little 340. I just needed a hammer to thumb. That WC820 is close to H110 in burn rate (surplus .30 Carbine powder). I had a 637 that I really liked too. The sub 16 oz. range is my happy spot. My .380 Kahr weighs about the same as the 340/360, 11-12 oz. empty. It has 7 ready to go and I carry the longer 7-shot extra mag. for back-up.

Do you carry an extra speedloader, or strips? The HKS are fine for me, I have several. I'd rather twist than have it pop rounds out in my pocket.

Strips. At least in summer. Easiier to hide.

Jim Taylor
[subject]
Tuesday, July 14, 2026, 15:16 (8 days ago) @ WB

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The do-all sp101

Dave H.
[subject]
Tuesday, July 14, 2026, 16:51 (8 days ago) @ WB

Lightweight and with book max 180s, it punches waaayyy above its weight class!

I have found the batch of WC820 I have

Blake
[subject]
Tuesday, July 14, 2026, 16:53 (8 days ago) @ WB

is considerably “hotter/faster” than H110 or 296! Like by 4 to 5 gr in a 41GNR load

I think there were 2-3 different production runs of W820.

Sean Harper
[subject]
Wednesday, July 15, 2026, 04:42 (7 days ago) @ Blake

My 820 runs 2 grains hotter than my H110.

Sean

I tried that and it was still to hot

Blake
[subject]
Wednesday, July 15, 2026, 13:58 (7 days ago) @ Sean Harper

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Notice the 125 gr. 150+ fps gain with Viht N110?

WB
[subject]
Wednesday, July 15, 2026, 13:23 (7 days ago) @ Jim Taylor

I've never read of it but boy, that is a notable increase in velocity! Skunks H110/AA9/ whatever.

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