Congrats on the hunting success and great picture. If it can work out, Pronghorn that hasn't been run and can be cooled off relatively quickly is good eating.

Nice rifle Zack. Is it an original or a rebuild-copy/restoration. If original, any history to the rifle? What type front sight and why the rib underneath? Like the heavy schnabel forend. Which ever it is, it is a very nice rifle. I like Trapdoor sporting rifles and you don’t see to many. John

wow nice goat and beautiful rifle!!!! did you build your rifle or buy it that way ???? i have one too found it talking to a friend out west. he knew i was looking for one a shooter not necessary to be a collector,  and so i bought it from his friend and once i got it home started to checking its serial number. made in 1886 as a m-1884 rifle.  when it became a sporting rifle is the big question ? in talking with the guy i bought it from he gave me the number to the old man he bought it from.  he was a friend of his dad and grandfather and in speaking to him he said he had had the rifle for more than 70 years,  he got it from his grand father who got it from hid great grandfather whew!!
so the real heart breaker - he said he use to have some papers from the u.s. army about the rifle.  he said he was sure that his nephew used them one year to start a fire at there hunting cabin!!  even bigger heart break !!!!! he felt it would sell faster and for more money if he had it re-blued and the stock refinished !!! DEESH !!! so i had a guy here in Ohio and another one out west look it over. they both said that its possible it could be and original sporting rifle.  the old guy said it had been hunted with many times all thru its history with him.  thats enough for me to make it extra special to shoot and hunt with.
bore is perfect
SB
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hey zack, thought the barrel contour was different than mine. its a beautiful rifle though. thought about putting one of those cast iron pistol grips but i have gotten so use to it the way it is dont think i will just leave it the way it is.  oh i found a guy on gunbroker that made the scope base that goes on to the original buffington rear sight screws.  so i can put the rear sight back on which i can shoot targets still pretty good but i cant hunt with them.  my 61 year old eyes just cant see them deer well enough any more without a scope.  this 2X7 LER scope does the trick nicely. 
SB

I have a beautiful trap door that was apparently never issued. It is stamped 1873 but I have been told it is actually an 1884 mode  serial #3188641l. Unfortunately Bubba's grandpa just had to spoterize it. I love to shoot the rifle but the trigger pull must be twenty pounds. I didn't know they made set triggers for the trapdoor.   

You are right, it is marked 1873 and the serial # is 3188641.

Check your serial number again, looks like it has one to many digits (possibly one to many 8s). If your serial number is 318642 then it was manufactured in 1886.

rollingblock is right, one too many 8's. The # is 318641, so guess it was made in 1886. Thanks guys.