Hello
It seems so:
On 5 April 1945, Herget began testing a prototype variant of the Me*262 at the Lechfeld, the Messerschmitt test airfield. The Me*262A-1a/U4 which Herget tested was equipped with an adapted 50*mm (1.969*in) MK 214 long barreled cannon. It was believed that this weapon could bring down enemy bombers from outside their defensive firing range. The weapon system suffered from technical problems and was prone to jamming. On 16 April, Herget flew the Me*262A-1a/U4 in an unsuccessful combat mission against an United States Army Air Forces (USAAF) bomber formation. The weapon failed and no shot was fired. The Me*262 was then flown to Munich-Riem by Herget where it was placed under the control of Adolf Galland's Jagdverband 44 (JV*44—44th Fighter Detachment).[12]
Herget's last missions of World War II were flown with JV*44. On 27 April, Herget, accompanied by Oberstleutnant (Lieutenant Colonel) Heinrich Bär and Unteroffizier Franz Köster, engaged USSAF fighters near the Munich-Riem airfield and claimed his only aerial victory flying the Me*262, a Republic P-47 Thunderbolt, and last of the war.[
and here
https://books.google.com.br/books?id...%20262&f=false
Yours
Adriano B.