K6s hard cast ammo velocity - Kimber Forum

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Old 01-07-2019, 03:36 PM   #1
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K6s hard cast ammo velocity

I'm considering the k6s in either 2 or 3 inch barrel. The purpose will mostly be for hiking/camping defense against black bear and mountain lions. So I am particularly interested in the velocity achieved from this revolver in both barrel lengths when using a heavy, 158 gr or 180 gr, hard cast bullet. If anyone has any chronograph numbers they can share I would greatly appreciate it. Thank you.
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Old 01-07-2019, 04:23 PM   #2
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Should be the same as any Smith or Ruger with the same barrel length. Most bores are 356-357 and most hardcast lead runs 358 in size. Any chart you can find on velocities will give you the answers your looking for. Standard barrel, Standard Rifling. Nothing Special.
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Old 01-07-2019, 04:49 PM   #3
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I've looked into that but with small differences in barrel length, say 2.25 or 2.5 for the ruger, vs the 2 on the k6s I'm wondering how much velocity difference there will be. Also I've had trouble finding much 3 inch data. Looking at charts also seems to show pretty large differences between different guns of exactly the same barrel length. I guess due to differences in forcing comes, rifling, cylinder gap etc. So seeing data for this specific model would be helpful if it is available.
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Old 01-07-2019, 05:14 PM   #4
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Sorry Wings I can't give you any hard data but I will say that the .357 isn't exactly what you would call efficient from short barrels like the 2"-3" K6. I would suggest you start your loads with a FAST powder. The Hornady book recommends Unique for 158 cast bullets.

Go too slow of a burn rate and you're basically building a flamethrower. Just "spitballing" here but that even with a heavy load of Unique your looking to top out around 750-850 fps. Even a bit slower for 180s. Pretty mild for a .357 magnum.

And I would think with 180s from a K6 it's going to try to rip your trigger finger off. I have loaded many rounds for my S&W M-13, 3", .357 with Win 231, but I use 125gr JSP at around 950 fps with great results and very moderate recoil.

For more serious work I can push a 158gr to 1250 fps from my 8" 586 using Win 296 but I wouldn't shoot that from the 3" K frame. It would look like a road flare.
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Old 01-07-2019, 06:39 PM   #5
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Thank you for the response. I am not very experienced with 357 mag but I do understand that the short barrel is not ideal for velocity. However when hiking and camping I'm already carrying a lot of gear and keeping my firearm small enough to comfortably conceal is necessary.
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Old 01-07-2019, 07:06 PM   #6
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If your loading for specifically critters with large claws and teeth I would suggest a 148 grain hard cast wadcutter with 3.5 to 4.0 grains of unique in 38 special. These are very deep penetrators even through bone which is what you want.
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Old 01-07-2019, 07:14 PM   #7
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Have you been welcomed? Welcome to the site from Tennessee. PaulW gave you good advise. I don't have any reloading data.
I'm no bear or mountain lion expert but I would recommend leaving something else at home and upgrading to a larger caliber handgun, my choice (at the least) would .44magnum or larger. IMO
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Old 01-07-2019, 07:16 PM   #8
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Penetration is exactly what I'm looking for. That load you mentioned may do the trick. I don't suppose you have chronographed that kind of load?
Also on a side note. Buffalo bore claims 1302 fps 180 gr 357 out of a 3 inch j frame. I'm not sure that is actually achievable. Any experience? Any knowledge of that rounds performance from a 2 inch barrel?
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Old 01-07-2019, 07:18 PM   #9
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Ty for the warm welcome 2sharp. I considered the 44 mag but decided on 357 for size and weight as well as the ability to load 38 special for 2 legged predators. I do however appreciate the advice.
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Old 01-07-2019, 07:30 PM   #10
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The loading data says their right around 800 to 900 fps. With the 3.5 to 4.0 grains. I know their only 38 but they recoil light and penetrate deep. No need for more velocity as your not expanding a hollow point. They penetrate all the way through a hog so a clawed critter shouldn't be much of a match for them.
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