Quote from: FuzzyGrub on August 28, 2020, 12:08:02 PMQuote from: Jzizzle on August 28, 2020, 10:43:03 AMAppreciate that. I don't have an OEM breech to compare. In fact, the only OEM part on this build is the trigger assembly.As I thought about it, it would need to be the same as the mrod breech or extremely close. The barrel and TP postion has to be the same, along with the width of the mag well. Still, how to get some input from someone that has already done it. I' hate to skrew up and trash it. Again, another reason to not seal TP to barrel....seal TP to breech, then breech to barrel.... I would not let this result in a less than ideal (.250 minimum) TP.....
Quote from: Jzizzle on August 28, 2020, 10:43:03 AMAppreciate that. I don't have an OEM breech to compare. In fact, the only OEM part on this build is the trigger assembly.As I thought about it, it would need to be the same as the mrod breech or extremely close. The barrel and TP postion has to be the same, along with the width of the mag well. Still, how to get some input from someone that has already done it. I' hate to skrew up and trash it.
Appreciate that. I don't have an OEM breech to compare. In fact, the only OEM part on this build is the trigger assembly.
Quote from: mackeral5 on August 28, 2020, 12:20:16 PMQuote from: FuzzyGrub on August 28, 2020, 12:08:02 PMQuote from: Jzizzle on August 28, 2020, 10:43:03 AMAppreciate that. I don't have an OEM breech to compare. In fact, the only OEM part on this build is the trigger assembly.As I thought about it, it would need to be the same as the mrod breech or extremely close. The barrel and TP postion has to be the same, along with the width of the mag well. Still, how to get some input from someone that has already done it. I' hate to skrew up and trash it. Again, another reason to not seal TP to barrel....seal TP to breech, then breech to barrel.... I would not let this result in a less than ideal (.250 minimum) TP.....John, I appoligize and not trying to monopolize your thread If so, I'll move to my Brod thread.Mike, how are you making the seal to the bottom of the breech? The curvature would seem to be a challenge and Exclusive has a small chanel at the bottom. See picture.Are you just drilling partial way into breech, and TP fits in that hole?
I'm sure you mention this elsewhere, but these pictures better describe what you were saying- but what material is that for the TP, I know you say "nylon" but there's a bunch to choose from, at my local hardware stores. Also- what is the I.D. of that tubing? I was picturing exactly this in my head before, you've simply confirmed it. Thanks!!
Very good info here.I spent some time today to disassemble everything. I drilled out the Hill Valve port from .2 to .234 at a slight angle. I enlarged the valve flat to .312. I opened the throat from .238 to .25. I think I can go to .266 maximum here.I enlarged the tube to .312.Next will be enlarging the breech and barrel ports. I will keep the same reg pressure as before (2500psi) to see what gains come from increasing ports from .2 to .234 and with increased throat.Goal is to hopefully lower reg setting with Jsb 44.75gr around 880-900 fps. I hope efficiency increases for ~40 shots on the 500cc bottle with 4k fill. Porting should be plenty at .234. Plenum is plenty around 80cc. Barrel length of 20" will be the limiting factor, so reg pressure may need to stay above 2200psi.More to come.
Been shooting the 50.15gr while waiting for more 44.75gr to get here. They are just as accurate up close, but when pushed beyond 50 yards then do begin to open up a bit. 50.15 flying at 885fps. Definitely will be sticking with the 44.75gr.I have some ultra light 39gr slugs coming too from griffin. These have a large poly ball inside to maintain a full length slug while being relatively light. According to griffin, these are devastating to game, but can become a bit squirly if pushed to fast. Can't wait to try them out.