Hello all- I’m looking forward to bringing you all information about loading 40 S&W and 10mm Auto! We haven’t yet covered that here on http://ultimatereloader.com, and I know a lot of you are interested in this topic, so here goes!
Before I get started loading (as always), careful attention needs to be payed to several factors, including obtaining brass, and proper brass prep. One of the issues that reloaders need to pay attention to (especially with 40S&W) is bulged cases that have been fired in semi-auto pistols with “partial support” in the chamber. The most notable example of this kind of pistol is the Glock series of polymer pistols. Since these pistols have a partially supported chamber, and since 40 S&W is a high-pressure cartridge, 40 S&W range pick up brass is likely to contain bulged cases.
In fact, that’s exactly the type of brass that I’ll be using for this series – range pick-up brass that I purchased from one of the ranges that I’m a member at. Unfortunately, a typical sizing die will not completely remove this bulge (as the bulge is at the base of the cartridge). We need a special tool to remove this bulge in order to have reloaded ammunition that is both safe to fire, and reliable in operation.
One of the best tools for this job is the Redding GR-X die for 40 S&W / 10mm auto. This special die system pushes the entire length of the cartridge through a carbide sizing ring. In this way, the GR-X die ensures that we’ll have bulge free brass from case mouth to rim!
Here’s the description from the product page on http://redding-reloading.com:
The new G-Rx Carbide push thru base sizing die is designed to restore fired cases from 40 S&W autoloading pistols that exhibit a bulge near the base without the need for case lube. By passing the case completely through the new G-Rx Carbide Die, the bulge is removed and the case may be returned to service.
I’m planning to run *all* of my range pick-up brass through this die before loading it. That way I’ll be sure that I don’t have any bulge issues. For 10mm auto, I’ll be using brand new Starline brass, so I won’t have to worry about bulges for the first pass at least.
I’m really looking forward to loading these cartridges! Do you guys have favorite loads for 40 S&W or 10mm or both that you want to share? I’d love to have some feedback on that…
**Note: Any load data on http://ultimatereloader.com is “use at your own risk”. Always cross-reference any data used with manufacturer’s data.