That's western .44 in the pic so the flash is pretty close to reality since the powder used in them burns slower than that used in modern guns. So the will be a muzzle blast although it would be more a blast of greyish smoke with only flecks of red in that lighting, the red/yellow flash would appear only on much lower lighting. Ratteler, Muzzle blast does not equate to how hard the bullet is going hit, a .38 coming out of a 1 inch barrel with a 3 in. muzzle flash will hit just as hard as one from a 6 in barrel with very little flash.

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