GP100 SAAMI question

[HeXeD775]

What SAAMI can the GP100 in 6"bbl handle? I am looking loading up a recipie that lists SAAMI @ 42,500 using 5.5gr 231.

Will the GP100 handle that much CUP?

I can't find this anywhere.

[Steve_NEPhila]

The SAAMI Maximum average pressure rating fro the .357 Mag cartridge if 45,000 CUP. Exceed that at your own peril. I know that the GP100 is a well built revolver, yet I would not chance exceeding the 45,000 CUP in the .357 Mag.

Watch your units of measure also...

http://www.accuratepowder.com/data/P...0and%20307.pdf

BTW It does not matter if it is shot in a rifle or not.

[HeXeD775]

Thanks for the reply Steve. I am just checking b/c I have a recipie published by Winchester in 2005 for 5.5gr W231 as a max. I DO NOT for any reason intend on breaking that limit but the SAAMI listed for that load is 42,500. I wanted to be sure the GP can handle such pressure. I was reading thru my reloading books & found that is actually exceeding some other rifle pressures. I dont want to destroy my GP by usuing a recipe that is too heavy for it. My start will be 10% less than max...I am sure that I can't assume 10% less pressure.

[fingers80002]

You will be just fine with the GP100.....

As has been said, it is a tank...........

As is the SP101.................

[GRIZ]

The problem with using W231 in magnum loads is it is a faster powder and mistakes are easier to make and can be more costly. If you're using a slower bulkier powder and you make a mistake of 1 or 2 grains you and your gun will most likely survive. 1 or 2 grains with a fast powder can turn the round and your gun into a grenade.

Just be careful.

[Xringshooter]

If your looking to make some heavy .357 Mag loads I would suggest going with 296, 2400 or some of the newer Hodgdon powders. As said, more forgiving than a real fast powder like 231. You may also find (I did) that 296 actually will be more accurate.

The GP100's will easily handle the heavy magnum loads (your hands may not though )

[HeXeD775]

Thank you gang. As always you all have been very gracious to assist me. Thank you.

Is there a listing available anywhere that tells what the upper limits of particular firearms will handle...or is it wiser not to publish such material due in part to those that wish to "tinker" with pushing the upper limitations of said firearms just to see what they can get out of them?

[Xringshooter]

As far as I know, the gun manufacturers ARE NOT going to release this type of information for liability reasons. They will only state that their guns will handle ammunition that falls within the SAAMI specifications. That is why some will not warranty a gun if reloads have been run through it and something happened. And, IIRC, some will state in the manual that reloads should not be used and can void the warranty.

[HeXeD775]

As far as I know, the gun manufacturers ARE NOT going to release this type of information for liability reasons. They will only state that their guns will handle ammunition that falls within the SAAMI specifications. That is why some will not warranty a gun if reloads have been run through it and something happened. And, IIRC, some will state in the manual that reloads should not be used and can void the warranty.

Thanks...thats what I figured.

[GRIZ]

Is there a listing available anywhere that tells what the upper limits of particular firearms will handle

xring answered this question but let me add go by loads from manuals. It is possible for a load listed under max to be too much for your gun for a variety of reasons. That's why you work up from a starting load.

If you feel you need more power from that 38 use a 357. If you need more than the 357 get a 44 mag. Don't try to turn your firearm into something it wasn't designed to be.