Frequently Asked Questions

The extractor groove diameter on cartridge cases is the most important part of fitment into a moonclip. There is no SAAMI specifications for the extractor groove and each manufacturer makes them as they want. The following list gives you a great example. This is why the diameter size of the brass is critical to proper loading, unloading and fitment. Cartridge diameter too big and moonclip too small causes the moonclip to bend. The cartridge should rotate within their respective place and wobble slightly when all cartridges are loaded.

TKC BMT Chart

Brand of Ammo/Brass    Groove
.38/357                            Diameter
Armscor                              .365
Starline                               .366
Fiocchi                                .368
W-W Brass                         .372
PMC Brass                         .372
Rem Golden Saber Nkl      .374
Speer Blazer Brass            .374
Remington Brass               .374
Federal Brass                    .374
Hornady Nkl                       .375

This photo will give you an idea of what we mean.

 38size3.jpg

Use the search filters menus on the right hand side of the Moonclip web pages to assist you on the proper moonclip to purchase.
If you are unsure call us. See the Contact menu tab.

How do I load and unload cartridges into the Full Moonclip?

Video on the Resources\Videos menu tab.

What brand of brass works best in your .025 Thick - Full Moonclips?

Federal or Remington & others makes works the best with the .025 thick Full Moonclips, which fit all the .38/357 standard moonclip. They allow the cartridges to have some movement or wiggle so that they will fall right into the chambers once properly aligned. Winchester brass does not work at all as the groove width is too tight/small.

Starline Brass is used in specific clips that state that they are for Starline Brass.