The .410 slug capable or comical?

Guns Magazine, June, 2003 by C. Rodney James

  LOAD         REM.          FED.      WIN.      RWS

 Win. 42   3.2" to 4.0"  3.0" to 4.7"  6.6"  2.6" to 4.0"
Win. 9410      4.5"      2.6" to 4.7"  8.3"       NA

50-yard, 5-shot groups from sandbag rest.

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Winchester M9410 and vintage Model 42 were used for tests. Handloading experiments with buckshot rounds showed surprising performance. Contents of the Remington, Federal, Winchester and Brennake slugs. Note use of granulated fillers. Terminal performance tests on water-filled cartons gave high marks to the Brennake slug. Commercial slugs and handloading components tested.

With the Remington slugs it prefered the Model 42 performed surprisingly well

Springfield Armory's handy M6 Scout is another good slug shooter.