Double Ditto for using care with Titegroup, Bullseye and other powders that produce very small fills. Never mind a double charge, with the low fill ratio in a .38Spl case when using these you could triple or even quadruple fill and still seat the bullet just fine. And even a small 9mm case could easily accept a double charge and still look like there's lots of room for a bullet.
You really want to pay particular attention if loading on a progressive press. If something goes screwy you need to be double and triple certain that you're not starting back up after clearing the issue in a way that will produce a squib or double charge.
The other place where double checking is super important is when loading in batches of 50 on a single stage press. If dipping and funneling the powder it's easy to dip and pour without moving the funnel. Or missing the last casing when placing the funnel. So a super important step when loading on a single stage is peering into the cases with a flashlight and checking for the proper level of powder. And in the case of a low fill ratio powder such as Titegroup, Bullseye and others of that sort a keen eye for comparing the levels of adjacent cases is needed to be sure that there isn't a double charge. After all a correct measure of powder is only about 2.5 to 3 mm deep. And a double at 5 to 6mm would still not look like a big amount sitting down deeply in a .38Spl case.
Great info here. For single stage loading I use two loading trays and immediately after dropping the powder the loaded case gets transferred over to the second loading tray and thus preventing any double charges.


















































