Crunch, I have 3 .40's (2 nipples,1 flint) aside from the .38 of which is my favorite the .40's are a great bore size for just about anything. The most accurate is a Hawken (repro) that had a rusted out bore and I found that a friend had 3 old Douglas barrels in 1 inch .40. We traded around and that gun can shoot circles around anything out there. The flinter in .40 takes a bit too get used to. It is only a 13/16's barrel and sort of light for real accurate shooting. The other is a sort of southern mountain style and is a nipple gun. It is also quite accruate and a joy to shoot. My sister wants me to shorten the stock and remember her on her birthday. Go for the .40 you will not be sorry. Tryit.