@The Guide covered it. The only thing I’ll add is that there are plenty of vertical grip stocks that have designed the nose (front end) of the comb to accommodate the thumb muscle when you have thumb wrapped. Again, for me at least its less about the actual shot than it is about a relaxed and comfortable carry for these exact situations when I end up with an offhand shot—still hunting and similar. A vertical grip encourages more precise shooting from any position, but if it isnt designed well it is terrible for carrying the gun (which is far more time and arguably just as important). I prefer a grip that I can carry comfortably but still shoot
reasonably…which may or may not be “vertical”-ish.
Compare this—the nose of the comb is so chunky and wide and protrudes so far forward that it prevents wrapping your thumb comfortably while carrying the gun, regardless of whether you do that when actually shooting:
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Versus this anshutz stock that is similarly “vertical”, but is designed to accommodate the meat behind your thumb. This was the only picture I could find online that showed a stock like this, but there are others. I think the rockstock even has a very aggressive scallop here, although Ive never held one.
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