Hi all I have a new Challenge FT. Took it to the range today for the first ever shoot. Noticed it was shooting very low on zeroing paper set at 35 yards, even after winding my scope right up. put it across a chronograph and it was only shooting at 4.8 Ft pounds this was with 8.44 weighed JSB. Do any of you more knowledgeable chaps have any ideas. Before I get it sent back Also I noticed a ring of foam around where the pellet is inserted. Is this meant to be there ?.