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9/19/2017 7:27:10 PM
Posted: 9/4/2010 5:53:58 PM EDT
[Last Edit: 9/5/2010 4:02:59 AM EDT by Easy_E]
I worked up some loads for my 4" XD40C Springfield using Powerpistol . I loaded 5.6 grains to 6.9 in roughly half grain changes with 180 grain bullets . Every load shot well favoring the lighter loads . They all chronographed about 100fps under book speed maybe because of the porting?

I do mostly IDPA type shooting with friends so I need to knock over steel and shoot some twenty yard targets. So what way would you go ?
Link Posted: 9/4/2010 7:23:40 PM EDT
Link Posted: 9/5/2010 2:15:50 AM EDT
[Last Edit: 9/5/2010 2:16:18 AM EDT by sleepercaprice1]
Slow heavy bullets is the ticket for .40's and IDPA. I use 180's myself, usually Precision or BBI's with Solo 1000. I've found that .40 minor is softer shooting then 9mm.
Link Posted: 9/5/2010 4:10:18 AM EDT
Thanks Sleeper that was what I was thinking . All the rounds shot good enough for what I'm doing I just haven't tried them on steel.
I wanted to avoid loading something too soft or something too hot that would put unnecessary wear on my gun.
Link Posted: 9/7/2010 9:23:09 PM EDT
40 S&W is a higher pressure cartridge so I would use a medium slow powder like AA#7.
Link Posted: 9/8/2010 4:00:02 AM EDT
Originally Posted By NVGdude:
40 S&W is a higher pressure cartridge so I would use a medium slow powder like AA#7.


Higher than what?

Link Posted: 9/8/2010 5:48:12 AM EDT
[Last Edit: 9/8/2010 5:48:52 AM EDT by CBR900]
Originally Posted By steve4102:
Originally Posted By NVGdude:
40 S&W is a higher pressure cartridge so I would use a medium slow powder like AA#7.


Higher than what?



-higher than .45 ACP - which often runs 18,000 PSI or less. It is a popular cartridge - the .45 ACP. Another popular cartridge you should know about is called the .38 Special. It also typically runs at 18,000 PSI or less.

.40 often runs at around 36,000 PSI.

Just so you know, 36,000 PSI, is double the pressure of 18,000 PSI (i.e. math).

Link Posted: 9/8/2010 5:54:18 AM EDT
Originally Posted By Easy_E:
I worked up some loads for my 4" XD40C Springfield using Powerpistol . I loaded 5.6 grains to 6.9 in roughly half grain changes with 180 grain bullets . Every load shot well favoring the lighter loads . They all chronographed about 100fps under book speed maybe because of the porting?

I do mostly IDPA type shooting with friends so I need to knock over steel and shoot some twenty yard targets. So what way would you go ?


"IDPA type" shooting might allow barrel porting, but actual IDPA rules do not allow porting. In any event, the porting could cause lowe velocity. Or, your book data might come from the use of a pressure barrel whereas real pistol barrels often yield lowe velocities.

For IDPA, you only need to meet the 125,000 power floor for your gun - which shoots only in SSP, ESP and a revolver division. You are wise to use 180s. But since you only want to just exceed the power floor, you can use a faster powder, yielding less recoil and increasing your scores.

I suggest Solo 1000.

Try the 40 caliber reloading webpage on www.brianenos.com Much better info.

Link Posted: 9/8/2010 1:27:13 PM EDT
[Last Edit: 9/8/2010 1:32:12 PM EDT by Easy_E]
I was working from 165 for the power factor not 125. I guess that is major not minor ? I've never shot IDPA but practice weekly with guys that do shooting the same stages. Yesterday I was talking about going with a friend and he told me I can't use my gun.
I ended up loading some 6.6 gr loads of power pistol with 180FMJ bullets and it worked great. Plenty of power on the steel but manageable. Now that I found a gun and load I like I need to change something. I guess thats the fun of it all.
Thanks guys for all the input.



PS They are three foot low at fifty yards
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