Yessir that is a direct AL quote....quite a fellow when it comes to QB's
Yes I'm using the bulk fill cap and connecting it with the Ninja coil hose that Eric sells.
I'm filling to 1500 psi and I reduced the hammer spring weight to get 480avg fps. I use my AR2078 strictly as a 10m trainer so I tuned the velocity to optimize the best pellet. At 1500 fill I get exactly 30 shots off the stock tube. If I shoot ponied to the bottle I set the reg at 800 and blam away. This is the condition for 2000 shots on a bottle. I went through 4 tins in two days at the bench breaking the barrel in.
Sean
I took the plunge, and ordered a tube, yesterday.
It's going to be done a bit at a time- I still have to get a pump. That will come a bit later.
I'm going to play around a bit with my "D" on co-2- until I have a pump in hand.
In the mean time, the bbl will have to come off the "D" again. I'd like to get the breech end of the bbl cleaned up a little more. The JSB Predators feel like they're binding at loading- as do the heavy exacts. The smaller 14.3 gr daisy and crosman offerings seat in the bbl with no problem now...
Regards,
Doc Sharptail
"Ain't No Half Way"
-S.R.V.
Thank you Eric, and I made the valve POS seal a pos taking it out....he he. PCP for me tomorrow!
Well, ...interesting! At 1500 psi it sounds like a 22LR but there is something not right. Following the shot it sounds like i have a load of air traveling through the barrel after the pellet has left. I am guessing the valve is staying open too long? I had modded the valve and made a pedestal for the spring and might not have put enough tension on the spring, as well put a spacer about 3/16 on the hammer side. I am now left with the question do I remove the spacer or crank up the valve spring tension?. I have no numbers to share at this point but it shoots very strong. Shot count is way down as well, around 12 shots from 1500 - 650 psi
I pull mine apart all the time and reuse the breach seal and Orings
Did you do some deburring while you had it apart...I'm guessing yes
Sean
I did smooth everything out pretty nice. Think I should make some pretty brass end caps while it is apart. Caught myself reaching for the end of the barrel tonight....hard habit to "break"...lol
thanks Al, seems I didnt turn the knob to the proper diameter for a good knurl so I stopped before it was too deep. I will measure twice this time..lol. Right now I am thinking of a way to secure the end caps without drilling a hole down through the breech. Oh this kind of stuff makes my work day go much faster Work seems to be slowing my progress at home...ha ha