Read the whole thread. It's not about "lying about the circumstances;" it's about inconsistencies due to the investigators not having data for your specific load, and about the possibility of other witnesses telling a different story. In the face of a stressful event, perception and memory can become highly unreliable even with the best of intentions, to say nothing of Joe Crackhead's momma swearing he was a good boy who dindu nuffin' and was on his way to church when you shot him from across the street for no reason.That's all well and good as far as investigators determining justification. But there's an easy fix. Don't shoot anyone that doesn't need shooting and if you do need to shoot someone, don't lie about the circumstances. Problem averted.
Your story will be tested, including forensically. If the investigators can't replicate it with the data they have, that's a question that has to be answered. It's not saying you lied about the circumstances--it's that they don't know the circumstances, because your specific load data is one of the circumstances, and they don't have the relevant information on that bit.
We can go back and forth on this all day, but I'm going to stick with my advice to not add variables to an already-ugly equation. Each of us is, of course, free to do as he chooses, but if you're in the situation of adding non-OEM holes to somebody, you've already had a spectacularly bad turn of luck; why even take the chance of adding to your troubles?