Then you’re keeping the pellets anyway, so try them. However I don’t think I could get a 5.6 Wasp in any of my Weihrauchs. Assumed by your online name you’re a bit of a BSA fan…
Those old Wasps will fit in the Weihrauch barrel, but they'll be a tight fit. 'Back in the day", many of us used the old Wasps in German barrels. They were a very tight "snap" fit in my 127 Sport. But most switched to the German 5.5mm pellets.
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