Did you bother to read my post?  I stated that I shot targets as a boy for five years before I was allowed to hunt.  In addition, I primarily shoot at targets.  When hunting, I usually carry a rifle, but shoot it only once or twice.  I still shoot a very accurate single shot air rifle at targets, to keep my form up.  I am an enthusiast with considerable knowledge of firearms, their history, and ballistics.

You are wrong to say that any new regulation of firearms purchases, possession, or use of firearms would require repeal of the 2nd.  Our courts have ruled up or down for two centuries on restriction of ownership of all arms.  The 2nd doesn't specifically mention firearms, it just says "arms".  Explosives as arms are very strictly regulated; bows and arrows, far less so.  The 2nd is problematic, but it doesn't need to be repealed.  If anything it needs to be better understood, and it will continue to be interpreted by the Supreme Court in new ways.