i did a search on this and came up empty. i noticed a big difference in the breech plug on my 209x50 Encore and my friends 209x50. mine has a concave area where it contacts the powder, his is flat. i was looking at replacements at the store, and they are the same style as mine. my gun was purchased in early 2001, his was purchased in 2002. can anyone shine some light on this for me? thanks....