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Another option is getting 10 or so inert rounds/snap caps (with actual bullets on the rounds, but filled with silicone or some other substance that is visible where the primer would normally be). Not only does this allow you to simulate the actual weight, but when it comes time for range time, these inert rounds can be randomly inserted into your magazine to simulate a misfire that you have to clear. Mine has a red silicone visible where the primer would be, some people use erasers where the primer would be. You obviously must take care not to confuse these with actual live rounds for dry fire or carry purpose.