Got out the Auto Mags today |
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TC357MAX
International Auto Mag Joined: 10 Mar 2008 Location: Weyers Cave, VA Status: Offline Points: 98 |
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Posted: 01 Jun 2008 at 2:16am |
Well had a chance to try some new loads with my auto mag. My 44 auto
mag never has shot well with my reloads. Last thing I tried was a
different bullet, I ordered some 240 gr Sierra HP with a semi-jacket.
Both corbon and OWS shoot fine in my pistol. Originally I started with
23.0 gr of W296 they jammed. I worked up to 25.0 gr and still
jamming. Today I started over, I reduced the load to 21.0 grains
and only the first 2 in the clip jammed. I reduced load to 20.5 gr and
pistol shoots fine. Good for target load, but not as hot for
hunting. I averaged 1266 fps.
With the 357 AMP I worked up to 21 gr of W296 at 1613 fps. Seems like the 357 is going to be more reliable for hunting, feeds every time. I am glad to finally get both shooting with my reloads! |
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usrguns
Callahan's Auto Mag Joined: 09 Mar 2008 Location: Pensacola, ,Fl Status: Offline Points: 942 |
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Can't give you the data right now cuz I'm at work, but when I get home I will post a load that has been working great for me. I do know it uses Lil Gun and it's about 1400fps. Will post it as soon as I get home!!!!!!!!!!!!!
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usrguns
Callahan's Auto Mag Joined: 09 Mar 2008 Location: Pensacola, ,Fl Status: Offline Points: 942 |
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Carl. Here is the load I was talking about.
240 gr Hornady XTP
22.1 gr LiL'Gun
Starline Brass
Win LP
Case length 1.295
OAL: 1.605
Muzzle Vel: 1400 fps
I don't know if this will work for you, but my 44 Loves these.
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Ginsaw
Callahan's Auto Mag Joined: 09 Mar 2008 Location: TN Status: Offline Points: 460 |
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TC, what weight and kind of bullet were you using in the .357 to go with the 1613 fps?
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TC357MAX
International Auto Mag Joined: 10 Mar 2008 Location: Weyers Cave, VA Status: Offline Points: 98 |
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Thanks Larry, I will try to get some Lil' Gun and give it a try.
Ginsaw- I loaded Hornady XTP 158gr for the 357 AMP. |
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Ginsaw
Callahan's Auto Mag Joined: 09 Mar 2008 Location: TN Status: Offline Points: 460 |
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I know you probably won't have the answer to this, but do you have any idea as to the ft lbs of that 357 load?
I've been thinking of bringing it up in another thread, but I'm interested in learning what formula there is for figuring energy levels generally. You know, crank in the bullet weight and type and fps, and you get the ft lbs. There's got to be such a formula. With 44 many of us can estimate it somewhat, but something more scientific would be good to know. Personally I like about 1K, but not much more, for deer and that's one place it could be useful.
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Gerry
R.I.P. Joined: 08 Mar 2008 Location: MI Status: Offline Points: 1085 |
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Ginsaw
All Reloading manuals have tables to calculate the ft lbs of energy of a given load.
If your want a good Father's Day present, ask for "Understanding Ballistics" by Robert A. Rinker. It gives an easy understanding of what happens everytime you pull a trigger.
Gerry
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TC357MAX
International Auto Mag Joined: 10 Mar 2008 Location: Weyers Cave, VA Status: Offline Points: 98 |
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158 gr bullet @ 1613 = about 913 ft/lbs. Not far from 1,000
E = (bullet weight X velocity squared) all divided by 450,400 that give a pretty close number. |
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Ginsaw
Callahan's Auto Mag Joined: 09 Mar 2008 Location: TN Status: Offline Points: 460 |
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I tried playing around a little with the formula and it appears the first thing I need is to find a calculator that goes that high. Up til now I've been going by a rough estimate to the effect that a change in fps seems in many cases to equal a similar amount of change in ft lbs. For instance, in 44 factory ammo there's about 100 fps difference between several brands and a not far off difference in ft lbs also.
I don't have many 357 figures to compare it to, but -
Buffalo Bore 357 158 @ 1475 = 763 ft lbs
Federal 357 158 gr @ 1240 fps = 539 ft lbs
Winchester 357 158 gr @ 1235 fps = 535 ft lbs
Same pattern as with the 44. The difference between the Buffalo Bore and the next two is about the same for fps and ft lbs. I'm probably missing some reason why this theory of estimating ft lbs wouldn't always pan out. Anyone see what it would be?
Gerry, I'm not a reloader so I probably won't get into those manuals. But the book does sound good and I'll look into it.
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Gerry
R.I.P. Joined: 08 Mar 2008 Location: MI Status: Offline Points: 1085 |
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I think I got my copy from Midway. Interesting stuff.
Gerry
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