If you get caught they will come and confiscate all of your guns on top of fining you and throwing you in jail and not letting you ever own another firearm. Is that worth being able to hold 5 more rounds in your magazine? I don't think so.
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I just picked up two boxes, 100ea, of FMJ Winchester .45 ACP at Walmart for $31/box. I also picked up a 100 rds of 40 S&W for $27 and two boxes, 15ea, of 3" magnum 00 buck shot for about $12/box. Oh, I forgot to mention the Walmart is in Cleburn Texas.
I'm on a business trip here and stopped in the local Walmart to see if they might have some ammo for cheap. Lucky for me they did but the sales person told me I'm lucky they had any because it usually sells as soon as they get it. He said the shipment just came in and he hadn't even put it on the shelf yet. It looks like this ammo shortage is across the whole U.S.