I would make a custom bolt. Even though it is on 0.015" per side the o-ring will extrude and blow out.Post pix along the way...
If you are using a 1322 steel breech, the bolt is dead simple to make from a piece of 1/4" rod.... Turn down the end for a probe, or drill it and insert a 7/64" rod for a probe, or make it into a flow-through style.... The part that fits through the O-ring in a .25 cal MRod barrel is 1/4" diameter.... same size as the main OD of the bolt in a 1322....I'm not sure if you can use a 39X linkage in a 1400 tube.... The 39X tube is over 3/4" ID and the 1400 tube is only 0.62" ID.... Why not use a 1400 linkage?.... Either way you will need a custom, adjustable length piston....Bob
Is this the "official" project thread Matt?If so I like where this project is headed Me too!!!
Quote from: Rescue912 on April 09, 2015, 04:01:57 PMI would make a custom bolt. Even though it is on 0.015" per side the o-ring will extrude and blow out.Post pix along the way...When I did my 1325 using a 2100 pump tube with an extended valve nose I just used a .22 bolt and tape under the oring... no blow out... but I was only lobbing 20.1g H&Ns 630-650 fps... at 17 pumps.I did have to open the breech at the barrel very slightly mine was a hair under .25 and pellets would not feed thru..I picked up the BnA .25 barrel already turned down for the Crosman steel breech.But I would now just get the np 725xl barrel back then they were about 20$ and I am pretty sure it is the same barrel... this route would require removing it from the block and turning it down to 7/16 to fit the breech from 9/16" yourself though... It was a very accurate barrel at those speeds out to the 30 yards I have to test. It is a 19" barrel. the good part is the shroud parts fit and 3/4 elec tube fits for the tube...
this is the barrel I picked up for my .25 build but you just might be better off with the marauder barrel for a little more Green mountain has a good rep...http://www.bryanandac.com/goodsandservices/barrels/25-caliber-barrel-crosman-steel-breeches/
Quote from: K.O. on April 22, 2015, 03:32:09 AMthis is the barrel I picked up for my .25 build but you just might be better off with the marauder barrel for a little more Green mountain has a good rep...http://www.bryanandac.com/goodsandservices/barrels/25-caliber-barrel-crosman-steel-breeches/This would be your best bet Matt, that is a great price!
Good news. My machienest has my valve extention made. I should be getting my 1400 tube and linkage next week. http://i854.photobucket.com/albums/ab102/pellethuntr/20150423_074248_zpsgkfz81vb.jpg
Quote from: Matt15 on April 23, 2015, 02:01:13 PMGood news. My machienest has my valve extention made. I should be getting my 1400 tube and linkage next week. http://i854.photobucket.com/albums/ab102/pellethuntr/20150423_074248_zpsgkfz81vb.jpgIf I would have known it was going to make it to the open forum I would have taken a better picture lol