357 Magnum

[JeffreyDeGraff]

I got some 190gr hunter supply WFN bullets yesterday. Going to see what I can do with them in my 4” GP100 357mag. I think I’m going to start with 2400 and H110.



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[Harter]

I have access to 6"Sec 6 and a 5-5/8 3 screw OM BlackHawk. I loaded some 170 HC Speer over 14.5 H110 from the rifle data section of the Lyman book . They're fantastic in the 18" 1894 C . I think that was when I broke my wrist the first time . I fired 2 in the Sec 6 thinking maybe my grip was bad the first time . My grip was fine not so much the load .

[JeffreyDeGraff]

I’m hoping for no broken wrist tomorrow


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[JeffreyDeGraff]

Well I shot both loads Sunday. 25yds off a rest. The 2400 load was 1250fps and had a 3” 6 shot group. The H110 load was 1225fps and a 3.5” group. It was 91° out the H110 had a little bit of sticky extraction, but I’ve had worse out of factory ammo. Both powders showed promise, I’m going to reduce the loads a little and see if that will tighten up the groups a little.




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[Flyeralan]

And, no broken wrist? Good work, seems like a good start.

[JeffreyDeGraff]

I reduced the loads a little, hoping for a bit better accuracy. No dice, both loads shot just about the same as last time. Back to the drawing board.




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[JeffreyDeGraff]

I’ve settled on 11.7gr of 2400 with this 190gr WFN. After shooting it a few more times, I realized I was the culprit. It’s been consistently printing sub 3” groups at 25 yards. I think that’s the best this guy can do.


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[JeffreyDeGraff]

I loaded some of these 190gr WFN bullets for a friend’s GP100 and 12.9gr of H110 was extremely accurate out of it. He wanted a round for his 357 that could take down a Bigfoot. I told him this one was guaranteed to go through 2 Bigfoots.


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