I think I agree if the round count is high enough already sure whats a few more ...but if brand new or really low round count I would shy away from test firing 50 rounds.

One thing I like about dealing on here is I figure I can buy it. and go test it with in a day or so and the seller will be a stand up guy. ( since most folk on here are ) if there is an issue. ( or same day .. I've gone from a deal to the range within 20 mins and that was all drive time LOL)

Of course that don't always work out .

The Moss 500 I got last year didn't get fired for 8 months! but of course it worked just fine as expected.