Dano, are you talking about 40 fpe out of the B50 with Crosman pellets or with Eun Jin pellets?
I'm getting 867 fps with CPHPs, about how fast would you reckon the 28.6 gr Eun Jins are running?
I can't chrono them right now, my chrony is shot.(I WISH I were kidding)
I'd like to be able to run between 850 and 1000 fps with Eun Jins.
I considered converting to .25 or .30 cal, but Georgia's hunting regs only allow .22 cal or smaller air guns to be used. I think it's stupid. It should be .177 or larger. I can kill squirrels DRT (dead right there) with a .177, and do it on a regular basis, but the .22 definitely does the job better. A .25 or .30 would be amazing. I'd like to rebarrel one of my springers to .40 cal smoothbore for shooting blowgun darts. I've killed rats and squirrrels with broadhead blowgun darts and they work fine. They'd be amazing with some serious velocity.
Maybe buy another B50 or build a QB78 PCP and rebarrel it to .40 caliber dart. Use my 8 shot blowmatic cylinder to make it a repeater.