mrgaf said:
Got me a load of nice LC brass. I deprimed and sized to .223 and trimmed to specs. Getting ready to reload em but I've heard that LC brass is thicker and as a result a reduced charge is required. If, true bout how much should I reduced the powder charge? 2%? Will be using H335. Thanks!
Don't know your current brass, powder charge, rifle, and chamber. So it's not possible to say whether your LC brass has thicker walls or whether you'd want to adjust your load up or down.
If you want to find out if your LC brass has thicker walls that will increase pressure, grab a piece of your current brass and an LC. Both should be either fired from the same gun and cleaned (preferred), or resized with the same die. Trim both to the same length, put a spent primer in both cases, and weigh each one. Then fill both with water to overflowing and weigh both. Subtract to get the weight of the water they hold and compare.
If the LC brass held less water, start low and work up. If the same, ignore. If LC held more water, you'd theoretically need to add more powder, or ignore it.
Bottom line - if you really care about small differences in pressure, you're already separating your brass by headstamp. So unless you are already at max load/pressure for your chamber, it's probably fine to ignore it.