I've seen many discussing stitch groovers and if they should or shouldn't be used, including on this forum. But none of the threads really give me an answer to when this would be of concern.
Currently, when I make cartridge belts (even if I only made 3) I use a groover for everything. My groover is sharpened a bit differently so that it cuts a shallower groove than most off the shelf groovers. I then use a modeling tool to burnish in the groove to make it deeper. This is the method I find gives the most crisp looking results.
If my workpiece is over 7-8 oz, I use this type of burnished groove for decorative lines too as I find it looks cleaner than a creased line. Lined belts, as I've mentioned in another thread, can be made two ways. The ones I have made are fully stitched through to hold the loops. I groove a zigzag pattern on the back of it to protect the thread holding the loops.
This is where my first question comes up. Is this a bad idea? Since the grooves go across the belt and not along it, I'm thinking this could cause a possible weakspot. Note that the grooves do not go fully across the back, only where the loop stitches sit. With the liner in place, the workpiece corresponds to 15-16 oz leather.
My second concern is regarding holsters. A holster is folded and naturally wants to spring outwards. I groove both sides for the stitch, both on belts and holsters. This is where I'm concerned a second weakpoint might form as the grooves, both for stitches and decorations, go across the tension and not along it. The holsters I make are heavy Mexican double loop holsters made of 10-11 oz leather. The holsters are not lined.
As a reenactor I need to be able to walk around a lot without wearing out the stitches, which is why I prefer to groove both sides.
Long story short, In terms of aesthetics, I am much happier with burnished grooves for both stitches and decoration than I am with creases, Especially the way they darken when dye is applied, which creases do not. But am I playing a risky game or am I good to go?