[Little Bill]

I am looking at a couple of different ways to get my 40 brass so it will consistently fit in a tight chamber, and I was considering a Redding GRX or Gizmo. I have read ALL of the threads, but I didn't find the post-sizing dimension of the brass. Could someone with one or each post what the brass dimension is after sizing? Maybe give a measurement at the mouth, the web, and the largest spot. (I am guessing that the dimension should be about the same all of the way..... .418, .420, .422?) Thanks!

[D. Manley]

Little Bill, on Aug 29 2009, 08:26 AM, said:

I am looking at a couple of different ways to get my 40 brass so it will consistently fit in a tight chamber, and I was considering a Redding GRX or Gizmo. I have read ALL of the threads, but I didn't find the post-sizing dimension of the brass. Could someone with one or each post what the brass dimension is after sizing? Maybe give a measurement at the mouth, the web, and the largest spot. (I am guessing that the dimension should be about the same all of the way..... .418, .420, .422?) Thanks!

I checked a few Winchester cases that were ran through the GRX and U-Dies. Largest diameter was .421 and was at the case head. Case mouth varied from .415 to .417. Understand that the GRX does not resize the case mouth sufficiently for loading, running through a normal sizing die is still required. I did not have any fired, unsized cases to give you a yardstick of what changes the GRX only would make toward the case mouth. It's pretty much a mute point anyway since the case mouth has to come down some more for bullet tension. I can tell you from using the GRX that you need a very rigid bench and you will use lube. I find HOS too light but a liberal coat of Dillons spray works OK. Most go through without a lot of effort but you frequently have to really man-up on 'em even with, no visible bulges.

[Little Bill]

D. Manley, on Aug 29 2009, 06:23 PM, said:

Little Bill, on Aug 29 2009, 08:26 AM, said:

I am looking at a couple of different ways to get my 40 brass so it will consistently fit in a tight chamber, and I was considering a Redding GRX or Gizmo. I have read ALL of the threads, but I didn't find the post-sizing dimension of the brass. Could someone with one or each post what the brass dimension is after sizing? Maybe give a measurement at the mouth, the web, and the largest spot. (I am guessing that the dimension should be about the same all of the way..... .418, .420, .422?) Thanks!

I checked a few Winchester cases that were ran through the GRX and U-Dies. Largest diameter was .421 and was at the case head. Case mouth varied from .415 to .417. Understand that the GRX does not resize the case mouth sufficiently for loading, running through a normal sizing die is still required. I did not have any fired, unsized cases to give you a yardstick of what changes the GRX only would make toward the case mouth. It's pretty much a mute point anyway since the case mouth has to come down some more for bullet tension. I can tell you from using the GRX that you need a very rigid bench and you will use lube. I find HOS too light but a liberal coat of Dillons spray works OK. Most go through without a lot of effort but you frequently have to really man-up on 'em even with, no visible bulges.

Thanks!

Anybody have a Gizmo?

[Little Bill]

How about a Sunday afternoon bump?

[Little Bill]

<chirp...chirp....chirp....> (crickets)

[CHA-LEE]

I use the Gizmo to resize all of my brass before reloading. I am currently using the EGW Undersize die in the Gizmo and every single case ends up .415 from top to bottom after its pushed through the die. I am using Montana Gold 180gr FMJ .40 bullets and after the round is pushed into the case the portion of the case that is expanded due to the bullet being pushed in is .420 then it tappers down to .415 below the depth of the bullet. If you use the standard .40 Dillion resizing die in the Gizmo it makes the case a consistant .417. The Lee Die that comes with the Gizmo will make the cases .420 but since this is the standard size of the .40 case you could get some smaller sections to the case and also battle with set back of the bullet.

I have been running the undersized .415 brass in my gun for a long while now with ZERO problems. Undersizing them to this smaller diamiter also makes the use of just about ANY brass I pick up at the range because I am making it smaller than what people normally use. I feel sorry for the guys that pick up my brass and are expecting to use a .420 size case because once you squeeze it down to .415 there is no going back.

[CHA-LEE]

I also want to mention that I do not use the resizing die in my Dillion 650 when reloading. I have the standard Dillion resize, depriming die in the press and since the cases are already .415 going into the press the standard .417 Dillion die doesnt even touch the case for resizing, only depriming.

[Little Bill]

Thanks for the info. I was making decisions a month or so ago on ways to make my badly Glock'd brass run in a tight chamber / tight throat 1911.

I decided to take the shellplate off of the 650 and have it milled .040 in the "pockets", and took my Dillon die to the grinder and ground all of the way to the carbide ring. (about .040?) The increase of about .080 sizes almost all of the case down to the web and gets out all of the Glock bulge. I will take some calipers to some finished rounds tomorrow or so. I think that the size die takes it down to .418, but the web / rim of the case remain at .420-.422.

This seems to work well and it saves me the step of sizing all of my brass before it hits the reloader. I am going to try a U-die at some point to see if I like the results.

[CHA-LEE]

Little Bill> I have heard of some guys cutting down the height of the shell plate and grinding the die up to the carbide ring like you have done. But both of the guys that did this eventually tore through the shell plate because it was too thin and there was too much friction. These guys were not using any case lube so using that may minimize the chance of this happening.

[yukondave]

I have a Dillion 650 and after resizing the 40 S&W brass it did not fit into the Lee Case Gauge. I ordered the Redding GRX and it works wonders but you really have to lube and man handle them. I called Dillion and spoke with them about the problem. They said to order the Dillion case gauge and they sent me a replacement deprime/sizing die. The new 40 S&W die from Dillion did the trick. It seems they have adjusted the new dies to go a little further down the side of the case. Also the Dillion case gauge seems to be just a hair bigger than the Lee Case Gauge. The round cycles fine with standard 16lbs spring and no problems getting back to battery. The 14lb spring also works fine with a lite load (135pf).

I shoot Wolf Small Pistol Primer, Montana Gold 180gr CMJ with 3.5gr titegroup, about 750-760 fps, 1.135-7 OAL to make minor power factor of about 135 PF from a SIG 229. I just started shooting the FMJ and they smoke more. I will post the numbers when I bring the chronograph back to the range. I did not notice the smoke with the CMJ but I can really see it with the FMJ.

This post has been edited by yukondave: 07 December 2009 - 11:10 PM