Welcome to the forum. We have an area for "Introductions". Stop in there and introduce yourself.
The suggestion of a AR-15 has, as you stated, low power.
What is recommended for high power as stated in the title of this?
This kind of thread seems to be the works of a troll.
"A well regulated Militia, being necessary to the security of a free State, the right of the people to keep and bear Arms, shall not be infringed."
Life Member NRA
Life Member NAHC
Former President of the ECPT (Eifel Combat Pistol Team)