No, I get muzzle flash from W231 in the .45 as well... but this is with a 4" barrel. It is not as great as Unique, but it's more than my sample load of BE-86.
Because my aging eyes have a hard time picking out the black on black sights in the washed out light of the indoor stall, I regularly turn the lights off in the stall when I'm shooting... so I can see the muzzle flash quite clearly.