I didn’t see n565 on the Barnes data. I’ll go back and look. I appreciate the response!You may want to reach out to unknown munitions. They used imr 4955 so I'd lean towards 565 or 4831sc.
Fwiw I load these in 2 cartridges and I just started with barnes lrx data- the lazers took a touch more powder to pressure out than the lrx