375-325GC

Welcome to the very first “Mould of the Month” promotion from Cast Bullet Engineering. Our intention is to highlight one of the designs each month from the 600 strong CBE range. We’ll go into a little more detail about the design in question and provide some detailed measurements of the bullet in an aid to help you make an informed decision on your choice. For April 2014, the bullet we have chosen is the 375-325GC. As with all CBE numbering nomenclature, the first three digits are the nominal bullet diameter and the second two or three digits is the nominal weight of the bullet, usually measured from wheel weight alloy. The letters at the end, “GC”, indicate it is a gas check design.

I bought my first single cavity mould of this design from Jim Allison sometime in the early 1990’s, not long after I acquired a Winchester Super Express in 375H&H Mag. It had seen some limited use in the NT on a hunting trip, firing a total of 9 rounds when I bought it. The barrel was a little rough in it, so I shot many thousands of cast bullets out of it in an effort to smooth it up, which it did admirably. Many of those bullets were the 375-325GC design. I liked the design so much, I had Jim make me another single cavity mould exactly the same, to speed up production. At the time, it was only able to be made in a single cavity configuration. We now have a larger brass bar to work with, and can make it in either single or double cavity these days.

The bullet is a bore riding style with a round nose and a small flat point. It has a crimping groove and two ample lube grooves along with the previously mentioned gas check shank. I can also make this mould as a plain base version should you prefer that option, the weight drops a little to around 300 grains. A crimping groove is also present.

The bullets diameter as cast from wheel weights is .376”. The overall bullet length is 1.265” and should stabilise in a 1 in 16” twist or faster. The small meplat on the nose is .125” in diameter.

The length from the meplat to the crimp groove is .675” and seated to the crimp groove, it still feeds from the magazine of my Model 70. Diameter of the bore riding section of the nose is .369”, and is usually a slight push fit into the muzzle of a 375 calibre rifle.

In my opinion, this is one of the best shooting heavy weight 375 designs we have, I’ve shot quite a few 5 shot groups at 100 metres of around an inch or slightly less with this bullet, using Gator checks and LBT Blue lube, which we will be stocking soon.

I’ve recently built up a 375-06 Ackley Improved, and can’t wait to get the time to try this bullet in that rifle.

Please click here to view this mould in our catalogue.