Ok, I apologise if I start a discussion that may not take us anywhere. Why I did ask is because "I" understood that Sectional Density had something to do with how easily or hardly a projectile will "expand" under certain condition.
I can see that we are going for a long discussion and it is not what I was meaning, I just like to understand all about the "fussy" about projectiles
Thank you for all of you guys who spent the time sharing the information I appreciate it. If you guys think it is a good "cause" to discuss I will be all "eyes and ears"
Cheers
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