As most of you know I recently purchased a BAM B40 from Mike Melick. It came undamaged except for a small dent in the stock, and the button on the bottom of the shroud broke off after about 100 shots.
Loading this gun with Crosman Premier Lites was a real pain so I spun a cone shaped grinding tip in the port a little with my fingers and it help. The Breech opening is very wet with oil and I have wiped it out several times. The trigger adjust screws came out on me so I Teflon taped. It shoots ok but not near as expected with the CPLs flying all over the paper like a shotgun blast at all distances even down to 8 yards. I have borrowed a Chrony from a friend and the numbers on this gun are terrible. 650 with CPLs, 740 with RWS Super HP(6.9?), and 615 with Crow mags. Compared to all the reports I have seen on this gun from other users I am wondering if I got a bad seal or bad spring. I have not opened it up as I have not seen any info on the proper way to break it down. I am wondering if it is my altitude (6,800 ft above seal level) that is causing the low numbers or is it just taking a long time to settle in, I already have about 500 shots through it with several types of pellets. A breakdown or tune guide for this or a TX200 would be ideal as I have been unable to find one yet.
I copied this from my post in the other thread as I don't think many will see it buried there.
As an update I am still disappointed with the B40. The FPS after a few hundred shots barely breaks 650fps with a CPL 7.9 gr. The RWS Super HP will go 740 average and group well. The CPL will not group less than 1 inch CTC even at 8 yards. Crow Mags seem to group the best but only give me about 615 FPS.
The trigger settings just flat suck. I ended up drilling a hole through the guard so that I could get to the screws better. I added some Teflon tape to the screws to keep them in place, then actually added a little weight to the trigger as it was at about 4 ounces or less to pull. Also the loading port/breech is full of oil of some sort that I and clearing out about every 30 shots. I like the scope, much more clear than the leapers or Barska scopes and it has not budged even a little since I mounted it.