few hints for 38/357
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few hints for 38/357


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Old 02-22-2013, 12:23 AM   #1
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Default few hints for 38/357

i am in the process of purchasing a gp100! woot woot.. so any hints for good ammo recipes?

ive been looking up ammo and ive notice a lot of different bullet weights. is there a big difference in recoil and accuraccy between the 125 gr vs a 158 gr?
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Old 02-22-2013, 12:57 AM   #2
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19.0 gr H110 under a 140gr XTP

16.8 under a 158gr JSP
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Old 02-22-2013, 01:09 AM   #3
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Hello JJ, I bought a GP100 for my wife about a year ago. It was her choice of many for a home defense firearm. She loves to shoot it. The loads I use for her are for the most part 'loaded down' for her to plink with. And yes, the 125 gr versus the 158 grain should have a different recoil - 158 being more.

The load we use almost exclusively for my wife is 3.6 grains American Select with several 125 grain bullets - Berrys, Colo Cast, Missouri Cast, etc. This powder charge is probably below the 'start' charge so be cautioned about that. Other good loads with the 125 gr bullet is 5.8 Power Pistol and 5.2 Unique.

I think you will want to try the 180 grain cast bullets. Some excellent groups came from using 8.0 gr AA#7 and 10.0 gr H4227.

All of the above is 38 special loads. I have some more data on the 158 gr bullet if you are interested. Good Luck
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Old 02-22-2013, 01:17 AM   #4
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I own several GP 100's.

The lighter 125 gr bullest are genrally faster (1300-1400 fps) and the heavier bullets slower ( approx 1000 fps since the same amount of powder is generally used for each in factory loads.
The avg energy is often quite similiar betwen the light and heavy 357 Mag bullets ( tho hotter loads are available and aGP 100 can handle 357 Mag loads that are loaded so hot they put out as much energy as a 41 mag or a low end 44 mag)

Many shooters find the 158 gr round more comfortable to shoot than 125 gr round of equal energy.
My theory is that since the lighter round is faster the recoil bump will be more focused and "sharper" despite during a short time fraction than a 158 gr. This way the felt "peak" is higher, even though the toal energy might be the same.

Same say the 158 gr is better for hunting bigger animals ( deer) and 125 gr with its high speed and shock better for people.

Its a wide spread view.

IMO just try a box of each and decide which you enjoy most.
Any 357 Mag round will definetly ruin a bad guys day and be able to shoot thru drywall and car doors just fine if needed.

PS: It <is> possible to buy 158 gr factory loads that are loaded hot enough to be as fast as 125 gr loads but these are not comfortable round to train with for many.
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Old 02-22-2013, 01:21 AM   #5
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17 gr. of 2400 with a 125 jhp is a great defense round. It's not a max load but close.
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Old 02-22-2013, 02:39 AM   #6
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2 grains of Red Dot with 148 grain bullets. A pound goes a long way.
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Old 02-22-2013, 08:58 AM   #7
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Im at work right now but I believe the last load I did was 158gr backed by 6.9 grains of Unique. Worked very well in my Gp100.
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Old 02-22-2013, 02:38 PM   #8
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Quote:
Originally Posted by fupuk View Post
Im at work right now but I believe the last load I did was 158gr backed by 6.9 grains of Unique. Worked very well in my Gp100.
I lied it was 6.7 grains of Unique. Hope this helps.
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Old 02-22-2013, 06:53 PM   #9
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if you plan on using reduced loads (38special) use 357 cases and 38special charge weights.

trailboss is a fantastic powder for reduced power loads.
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Old 02-22-2013, 07:05 PM   #10
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For a good defense load, I use 125 JHP over a max charge of H110.

It chronos 1625 FPS from my 6 inch security six.

When most LE carried the .357 revolvers, the Federal 125 JHP was pretty much the standard.
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