If you're not committing a crime, then you're not prohibited from owning/using AP ammo. Now PA is a little more stringent than Federal, as anything in PA that can penetrate IIA is considered AP. Most all factory 5.7 loads will go through IIA, and EA's T6 would make Swiss cheese and then some(a) Offense defined.--It is unlawful for any person to possess, use or attempt to use a KTW teflon-coated bullet or other armor-piercing ammunition while committing or attempting to commit a crime of violence as defined in section 6102 (relating to definitions).
(b) Grading.--An offense under this section constitutes a felony of the third degree.
(c) Sentencing.--Any person who is convicted in any court of this Commonwealth of a crime of violence and who uses or carries, in the commission of that crime, a firearm loaded with KTW ammunition or any person who violates this section shall, in addition to the punishment provided for the commission of the crime, be sentenced to a term of imprisonment for not less than five years. Notwithstanding any other provision of law, the court shall not suspend the sentence of any person convicted of a crime subject to this subsection nor place him on probation nor shall the term of imprisonment run concurrently with any other term of imprisonment including that imposed for the crime in which the KTW ammunition was being used or carried. No person sentenced under this subsection shall be eligible for parole.
(d) Definition.--As used in this section the term "armor-piercing ammunition" means ammunition which, when or if fired from any firearm as defined in section 6102 that is used or attempted to be used in violation of subsection (a) under the test procedure of the National Institute of Law Enforcement and Criminal Justice Standard for the Ballistics Resistance of Police Body Armor promulgated December 1978, is determined to be capable of penetrating bullet-resistant apparel or body armor meeting the requirements of Type IIA of Standard NILECJ-STD-0101.01 as formulated by the United States Department of Justice and published in December of 1978.