That short-barrel Rugilator's a neat gun. I bought one in 1966, although I disremember if it was 4-5/8 or 5-1/2. Even my memory gets fuzzy from time to time. But, BossLady let me take it out and play, grudgingly. 2400 was the common powder for full-house loads, back then. At night, that doofer would definitely light up the sky.
The Delta Elite's a good 10mm. I did a trigger job on mine, and the usual ramp polishing. I added a beavertail to it. MMC sights, IIRC. A buddy of mine kept drooling and slobbering over it, so to avoid rust I let him trade me out of it...