Hello, I wrote this up in ASSRA jpurnal, got nasty reply about using smokeless in Axtel sharps, voided warrenty, ringed chamber, etc. Well to set matter straight, as gun was being built, Had many phone conversations with Tom Axtel about smokeless use in his rifles. He said with sane loads perfectly safe, in fact he shot quite alot of it in his. Nuff said. Anyway, here is what happened: Trying new load using H4227, 300gr. 20-l lead bullet, 1.0gr.(weighed) tuft kapok, rolled out long and inserted in case but in no way compressing powder..let bullet base push down as bullet was seated. First shot seemed normal. saw hole in backer, as is my custom, blew thru breech and looked in bore..Black. ran rod in breech and felt obstruction right in front of chamber. Not wanting to push what I thought to be stuck bullet all way thru 34" barrel, reversed rod and as I did this thought perhaps that hole in backer was there all along? I got the supprise of my life when I saw what came out the breech...that 3" long tuft of kapok looked the world like a shotshell cverpowder wad! could break apart with fingers but compressed to bore dia. Debated to fire another, but wanted to see if a fluke, 2nd. normal..no obtruction, 3rd. left wad again, now I knew it was no fluke. fired remaining loads without further incedent. Gave up on H4227 as accuracy not equal to other loads I have. Here is question: How did that kapok wad end up at breech end of 34" long barrel AFTER the bullet left bore?? Could it be that by using a light charge of fast burning powder in that long 34" barrel, the muzzle pressure was so low that when the base of the bullet just cleared the muzzle, the wad was sucked back down the bore due to vacume of the leaving bullet?? I have since quit using kapok or any other kinds of wadding over powder charge. The only wad I use is a vegitable fibre one, .03" right at bullet base. Any ideas? Has this happened to anyone else? Thanks guys. Be safe out there!