Nimrod, .35 Whelens are frequently a problem for Encores. That is because the shoulder on them is so small that any headspace issue is exagerated. I've been learning about this cartrige in the Encore because I may be looking for one in the near future. What I found is that this is one where you may have to handload and play around with letting the case stretch a bit (or just the opposite and resize it a little shorter) to get the head at just the right distance from the breech face.