The rra barrels are designed to shoot 168grn boat tail hollow points. 150grn ball ammo boat tail or not is just basic machine gun ammo. Better results from that by loading em into a slingshot.
Your only going to get superior results from only a few hard to find factory brands or handloading.
"Gun control: The theory that a woman found dead in an alley, raped and strangled with her panty hose, is somehow morally superior to a woman explaining to police how her attacker got that fatal bullet wound." — L. Neil Smith
The problem with being stupid is you cannot simply decide to stop doing dumb things...
"I crapped my pants to avoid the draft!!" -Ted Nugent