I picked up one of these a few years back when they were cheap, and finally got around to SBRing it earlier this year. Nothing fancy - just chopped the barrel ahead of the nut using a hacksaw, cleaned it up with a hand file. Looks good, shoots very accurately. Lots of fun to shoot. HOWEVER, it has never run with 100% reliability, whether with the 16" barrel or the chopped barrel. It suffers from occasional feeding and ejection problems (maybe 2% malfunction rate). I have problems with multiple magazines, including the one that came with the gun, even when graphite lubed, so I don't think it is the mags.
I am running my regular USPSA minor PF 9mm 124gr RN FMJ reloads at around 1050fps. I tried increasing the velocity right up to the maximum recommended powder charge, but problems persist. Some of the feeding problems may just be weak brass - the bullets that misfeed sometimes display setback. Does anyone have a pet load that they find runs 100% in their Wiselite?