"I measure my powder with a test tube type measurer and tap on it until the powder goes down to 80 grains."

If I understand what you are saying you are using a tube that is marked in grains but not adjustable, then tapping it until it settles to 80 grains. I think that would be a rather inconsistant way of measuring powder. You need to spend $5 or $10 and get a real powder measure that is adjustablewith the swivel funnel top. I bought several over the last few years at Walmart during their end of season closeouts for around $3 or $4 each.

I have so far not had good luck with APP/JSG powder. It averages about 300fps slower than 777 of the same volumn. My son's Optima works very well with Pyrodex P and a 250 Shockwave (80 to 100 grains of powder). We always swab with a spit patch between shots for best consistancy.

Another thing to consider, try a heavier Powerbelt i.e. 348. Some guns prefer a heavier bullet for best accuracy. Also you may get better pressure from your JSG with the heavier bullet and thus get the bullet to "bump up" into the rifling more consistantly for better accuracy. Using more powder may help the 295's for the same reason.

Good luck with it.