Best pellet for 700mm .25cal Impact

JSB'
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s all the way, Mk2 33.95's sub inch at 100y @880fps, and 25.39's sub 3/8 at 50y @ 875fps, haven't tested Mk1's much. I would bet my pension they'll work for you too! BTW it didn't necessarily come that way, but was still pretty good!
 
+1 on the MK2 they are the best I found for the Impact 700 stx or slug liner. Here is one of the better groups shot at 100 yards from the slug barrel. Most groups were in the 1 to 1 1/2 inch arena. Although I did manage a few half inch groups they were not the norm for pellets but were for the slugs. Pellet barrel did pretty much the same. Five shots low on the target wind was unusually calm at the moment.

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